Add link to TIOBE Index on main page + fix issues (#1137)

* Add TIOBE + include SonarAnalyzer.CSharp

* .

* cp

* Copyright © WireMock.Net

* more fixes

* fix

* xpath

* if (Matchers == null || !Matchers.Any())

* if (Matchers != null)

* ?

* .

* .

src/WireMock.Org.RestClient/IWireMockOrgApi.cs

@@ -1,3 +1,5 @@
+// Copyright © WireMock.Net
+
 using System.Threading.Tasks;
 using AnyOfTypes;
 using RestEase;

src/WireMock.Org.RestClient/WireMock.Org.RestClient.csproj

@@ -31,7 +31,6 @@
 
     <ItemGroup>
         <PackageReference Include="AnyOf" Version="0.3.0" />
-        <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />
         <PackageReference Include="RestEase" Version="1.5.7" />
     </ItemGroup>