Remove nuget package warnings for icon and license URLs (#147)

Author: senseibaka

build/common.props

@@ -6,9 +6,9 @@
     <FileVersion>$(VersionPrefix)</FileVersion>
     <Authors>dataaction</Authors>
     <PackageTags>Sybase ASE Adaptive SAP AseClient DbProvider</PackageTags>
-    <PackageIconUrl>https://raw.githubusercontent.com/DataAction/AdoNetCore.AseClient/master/icon.png</PackageIconUrl>
+    <PackageIcon>icon.png</PackageIcon>
     <PackageProjectUrl>https://github.com/DataAction/AdoNetCore.AseClient</PackageProjectUrl>
-    <PackageLicenseUrl>https://raw.githubusercontent.com/DataAction/AdoNetCore.AseClient/master/LICENSE</PackageLicenseUrl>
+    <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
     <PackageReleaseNotes>Refer to GitHub - https://github.com/DataAction/AdoNetCore.AseClient/releases/tag/0.15.0</PackageReleaseNotes>
     <RepositoryUrl>https://github.com/DataAction/AdoNetCore.AseClient</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
@@ -42,4 +42,7 @@
       <Version>4.5.0</Version>
     </PackageReference>
   </ItemGroup>
+  <ItemGroup>
+    <None Include="../../icon.png" Pack="true" Visible="false" PackagePath="" />
+  </ItemGroup>
 </Project>