Add NuGet package icon

Author: metiftikci

src/NameAnalyzer.csproj

@@ -15,6 +15,7 @@
     <PackageLicenseUrl>https://raw.githubusercontent.com/jaqra/NameAnalyzer/master/LICENSE</PackageLicenseUrl>
     <PackageProjectUrl>https://github.com/jaqra/NameAnalyzer</PackageProjectUrl>
     <RepositoryUrl>https://github.com/jaqra/NameAnalyzer</RepositoryUrl>
+    <PackageIconUrl>https://raw.githubusercontent.com/jaqra/NameAnalyzer/master/assets/icon.jpg</PackageIconUrl>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
     <Copyright>2020</Copyright>
     <PackageTags>nameanalyzer, analyzers</PackageTags>