add license information

kiyoami · kiyoami · commit 7f6897c189a2 · 2020-03-08T17:37:13.000+09:00
diff --git a/composer.json b/composer.json
@@ -7,6 +7,7 @@
             "email": "bignet.k@gmail.com"
         }
     ],
+    "license": "MIT",
     "require": {
         "php": "^7.2"
     },
