Bump version to 2.12.0 in project file

Author: clement911

GraphQLSharp/GraphQLSharp.csproj

@@ -4,7 +4,7 @@
 		<PackageProjectUrl>https://github.com/Wish-Org/GraphQLSharp</PackageProjectUrl>
 		<RepositoryUrl>https://github.com/Wish-Org/GraphQLSharp</RepositoryUrl>
 		<Description>.NET Client for GraphQL - Modern and fast</Description>
-		<Version>2.11.0</Version>
+		<Version>2.12.0</Version>
 		<PackageTags>graphql;client;graphql-client;graphql-generator</PackageTags>
 		<Authors>Wish-Org</Authors>
 		<PackageReadmeFile>README.md</PackageReadmeFile>