Implement wrapper method of issue_stateless_channel_token (#814)

## Summary
- Add wrapper functions for the stateless channel access token API
- The original `issueStatelessChannelToken` accepts all parameters for
two different authentication patterns (JWT assertion and client secret),
making it unclear which parameters to pass for each pattern. These
wrappers make the distinction explicit through their names and
signatures.
- Supported variants:
- `issueStatelessChannelTokenByJWTAssertion` /
`issueStatelessChannelTokenByClientSecret`
  - `*WithHttpInfo`
  - `*Async`
  - `*AsyncWithHttpInfo`
- The original methods (`issueStatelessChannelToken`,
`issueStatelessChannelTokenWithHttpInfo`,
`issueStatelessChannelTokenAsync`,
`issueStatelessChannelTokenAsyncWithHttpInfo`) are marked as
`@deprecated` with references to the new wrappers.

## Test plan
- [x] Added tests for `issueStatelessChannelTokenByJWTAssertion`
- [x] Added tests for `issueStatelessChannelTokenByClientSecret`
- [x] Added tests for `issueStatelessChannelTokenByJWTAssertionAsync`
- [x] Added tests for `issueStatelessChannelTokenByClientSecretAsync`
- [x] Added tests for
`issueStatelessChannelTokenByJWTAssertionAsyncWithHttpInfo`
- [x] Added tests for
`issueStatelessChannelTokenByClientSecretAsyncWithHttpInfo`

Author: habara-k

docs/classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html

@@ -230,6 +230,46 @@ Search.appendIndex(
             "name": "createHttpClientOption",
             "summary": "Create\u0020http\u0020client\u0020option",
             "url": "classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_createHttpClientOption"
+        },                {
+            "fqsen": "\\LINE\\Clients\\ChannelAccessToken\\Api\\ChannelAccessTokenApi\u003A\u003AissueStatelessChannelTokenByJWTAssertion\u0028\u0029",
+            "name": "issueStatelessChannelTokenByJWTAssertion",
+            "summary": "Issue\u0020a\u0020stateless\u0020channel\u0020access\u0020token\u0020by\u0020JWT\u0020assertion.",
+            "url": "classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByJWTAssertion"
+        },                {
+            "fqsen": "\\LINE\\Clients\\ChannelAccessToken\\Api\\ChannelAccessTokenApi\u003A\u003AissueStatelessChannelTokenByClientSecret\u0028\u0029",
+            "name": "issueStatelessChannelTokenByClientSecret",
+            "summary": "Issue\u0020a\u0020stateless\u0020channel\u0020access\u0020token\u0020by\u0020client\u0020secret.",
+            "url": "classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByClientSecret"
+        },                {
+            "fqsen": "\\LINE\\Clients\\ChannelAccessToken\\Api\\ChannelAccessTokenApi\u003A\u003AissueStatelessChannelTokenByJWTAssertionWithHttpInfo\u0028\u0029",
+            "name": "issueStatelessChannelTokenByJWTAssertionWithHttpInfo",
+            "summary": "Issue\u0020a\u0020stateless\u0020channel\u0020access\u0020token\u0020by\u0020JWT\u0020assertion\u0020\u0028with\u0020HTTP\u0020info\u0029.",
+            "url": "classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByJWTAssertionWithHttpInfo"
+        },                {
+            "fqsen": "\\LINE\\Clients\\ChannelAccessToken\\Api\\ChannelAccessTokenApi\u003A\u003AissueStatelessChannelTokenByClientSecretWithHttpInfo\u0028\u0029",
+            "name": "issueStatelessChannelTokenByClientSecretWithHttpInfo",
+            "summary": "Issue\u0020a\u0020stateless\u0020channel\u0020access\u0020token\u0020by\u0020client\u0020secret\u0020\u0028with\u0020HTTP\u0020info\u0029.",
+            "url": "classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByClientSecretWithHttpInfo"
+        },                {
+            "fqsen": "\\LINE\\Clients\\ChannelAccessToken\\Api\\ChannelAccessTokenApi\u003A\u003AissueStatelessChannelTokenByJWTAssertionAsync\u0028\u0029",
+            "name": "issueStatelessChannelTokenByJWTAssertionAsync",
+            "summary": "Issue\u0020a\u0020stateless\u0020channel\u0020access\u0020token\u0020by\u0020JWT\u0020assertion\u0020\u0028async\u0029.",
+            "url": "classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByJWTAssertionAsync"
+        },                {
+            "fqsen": "\\LINE\\Clients\\ChannelAccessToken\\Api\\ChannelAccessTokenApi\u003A\u003AissueStatelessChannelTokenByClientSecretAsync\u0028\u0029",
+            "name": "issueStatelessChannelTokenByClientSecretAsync",
+            "summary": "Issue\u0020a\u0020stateless\u0020channel\u0020access\u0020token\u0020by\u0020client\u0020secret\u0020\u0028async\u0029.",
+            "url": "classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByClientSecretAsync"
+        },                {
+            "fqsen": "\\LINE\\Clients\\ChannelAccessToken\\Api\\ChannelAccessTokenApi\u003A\u003AissueStatelessChannelTokenByJWTAssertionAsyncWithHttpInfo\u0028\u0029",
+            "name": "issueStatelessChannelTokenByJWTAssertionAsyncWithHttpInfo",
+            "summary": "Issue\u0020a\u0020stateless\u0020channel\u0020access\u0020token\u0020by\u0020JWT\u0020assertion\u0020\u0028async,\u0020with\u0020HTTP\u0020info\u0029.",
+            "url": "classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByJWTAssertionAsyncWithHttpInfo"
+        },                {
+            "fqsen": "\\LINE\\Clients\\ChannelAccessToken\\Api\\ChannelAccessTokenApi\u003A\u003AissueStatelessChannelTokenByClientSecretAsyncWithHttpInfo\u0028\u0029",
+            "name": "issueStatelessChannelTokenByClientSecretAsyncWithHttpInfo",
+            "summary": "Issue\u0020a\u0020stateless\u0020channel\u0020access\u0020token\u0020by\u0020client\u0020secret\u0020\u0028async,\u0020with\u0020HTTP\u0020info\u0029.",
+            "url": "classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByClientSecretAsyncWithHttpInfo"
         },                {
             "fqsen": "\\LINE\\Clients\\ChannelAccessToken\\Api\\ChannelAccessTokenApi\u003A\u003AcontentTypes",
             "name": "contentTypes",

docs/js/searchIndex.js

@@ -135,10 +135,46 @@ <h2 class="phpdocumentor-content__title">Deprecated</h2>
                         <h3>Table of Contents</h3>
             <table class="phpdocumentor-table_of_contents">
                                     <tr>
+                        <td class="phpdocumentor-cell"><a href="reports/deprecated.html#src/clients/channel-access-token/lib/Api/ChannelAccessTokenApi.php">src/clients/channel-access-token/lib/Api/ChannelAccessTokenApi.php</a></td>
+                    </tr>
+                                    <tr>
                         <td class="phpdocumentor-cell"><a href="reports/deprecated.html#src/constants/StickerResourceType.php">src/constants/StickerResourceType.php</a></td>
                     </tr>
                             </table>
 
+                            <a id="src/clients/channel-access-token/lib/Api/ChannelAccessTokenApi.php"></a>
+                <h3><abbr title="src/clients/channel-access-token/lib/Api/ChannelAccessTokenApi.php">ChannelAccessTokenApi.php</abbr></h3>
+                <table>
+                    <tr>
+                        <th class="phpdocumentor-heading">Line</th>
+                        <th class="phpdocumentor-heading">Element</th>
+                        <th class="phpdocumentor-heading">Reason</th>
+                    </tr>
+                                                                        <tr>
+                                <td class="phpdocumentor-cell">1190</td>
+                                <td class="phpdocumentor-cell"><a href="classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelToken"><abbr title="\LINE\Clients\ChannelAccessToken\Api\ChannelAccessTokenApi::issueStatelessChannelToken()">ChannelAccessTokenApi::issueStatelessChannelToken()</abbr></a></td>
+                                <td class="phpdocumentor-cell"><p>Use <a href="classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByJWTAssertion"><abbr title="\LINE\Clients\ChannelAccessToken\Api\ChannelAccessTokenApi::issueStatelessChannelTokenByJWTAssertion()">ChannelAccessTokenApi::issueStatelessChannelTokenByJWTAssertion()</abbr></a> or <a href="classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByClientSecret"><abbr title="\LINE\Clients\ChannelAccessToken\Api\ChannelAccessTokenApi::issueStatelessChannelTokenByClientSecret()">ChannelAccessTokenApi::issueStatelessChannelTokenByClientSecret()</abbr></a> instead.</p>
+</td>
+                            </tr>
+                                                                                                <tr>
+                                <td class="phpdocumentor-cell">1212</td>
+                                <td class="phpdocumentor-cell"><a href="classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenWithHttpInfo"><abbr title="\LINE\Clients\ChannelAccessToken\Api\ChannelAccessTokenApi::issueStatelessChannelTokenWithHttpInfo()">ChannelAccessTokenApi::issueStatelessChannelTokenWithHttpInfo()</abbr></a></td>
+                                <td class="phpdocumentor-cell"><p>Use <a href="classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByJWTAssertionWithHttpInfo"><abbr title="\LINE\Clients\ChannelAccessToken\Api\ChannelAccessTokenApi::issueStatelessChannelTokenByJWTAssertionWithHttpInfo()">ChannelAccessTokenApi::issueStatelessChannelTokenByJWTAssertionWithHttpInfo()</abbr></a> or <a href="classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByClientSecretWithHttpInfo"><abbr title="\LINE\Clients\ChannelAccessToken\Api\ChannelAccessTokenApi::issueStatelessChannelTokenByClientSecretWithHttpInfo()">ChannelAccessTokenApi::issueStatelessChannelTokenByClientSecretWithHttpInfo()</abbr></a> instead.</p>
+</td>
+                            </tr>
+                                                                                                <tr>
+                                <td class="phpdocumentor-cell">1340</td>
+                                <td class="phpdocumentor-cell"><a href="classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenAsync"><abbr title="\LINE\Clients\ChannelAccessToken\Api\ChannelAccessTokenApi::issueStatelessChannelTokenAsync()">ChannelAccessTokenApi::issueStatelessChannelTokenAsync()</abbr></a></td>
+                                <td class="phpdocumentor-cell"><p>Use <a href="classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByJWTAssertionAsync"><abbr title="\LINE\Clients\ChannelAccessToken\Api\ChannelAccessTokenApi::issueStatelessChannelTokenByJWTAssertionAsync()">ChannelAccessTokenApi::issueStatelessChannelTokenByJWTAssertionAsync()</abbr></a> or <a href="classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByClientSecretAsync"><abbr title="\LINE\Clients\ChannelAccessToken\Api\ChannelAccessTokenApi::issueStatelessChannelTokenByClientSecretAsync()">ChannelAccessTokenApi::issueStatelessChannelTokenByClientSecretAsync()</abbr></a> instead.</p>
+</td>
+                            </tr>
+                                                                                                <tr>
+                                <td class="phpdocumentor-cell">1365</td>
+                                <td class="phpdocumentor-cell"><a href="classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenAsyncWithHttpInfo"><abbr title="\LINE\Clients\ChannelAccessToken\Api\ChannelAccessTokenApi::issueStatelessChannelTokenAsyncWithHttpInfo()">ChannelAccessTokenApi::issueStatelessChannelTokenAsyncWithHttpInfo()</abbr></a></td>
+                                <td class="phpdocumentor-cell"><p>Use <a href="classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByJWTAssertionAsyncWithHttpInfo"><abbr title="\LINE\Clients\ChannelAccessToken\Api\ChannelAccessTokenApi::issueStatelessChannelTokenByJWTAssertionAsyncWithHttpInfo()">ChannelAccessTokenApi::issueStatelessChannelTokenByJWTAssertionAsyncWithHttpInfo()</abbr></a> or <a href="classes/LINE-Clients-ChannelAccessToken-Api-ChannelAccessTokenApi.html#method_issueStatelessChannelTokenByClientSecretAsyncWithHttpInfo"><abbr title="\LINE\Clients\ChannelAccessToken\Api\ChannelAccessTokenApi::issueStatelessChannelTokenByClientSecretAsyncWithHttpInfo()">ChannelAccessTokenApi::issueStatelessChannelTokenByClientSecretAsyncWithHttpInfo()</abbr></a> instead.</p>
+</td>
+                            </tr>
+                                                            </table>
                             <a id="src/constants/StickerResourceType.php"></a>
                 <h3><abbr title="src/constants/StickerResourceType.php">StickerResourceType.php</abbr></h3>
                 <table>