Merge pull request #80 from grisha-kotler/RavenDB-24810-fix

RavenDB-24810 - set the correct LangVersion

Author: arekpalinski

src/Directory.Build.props

@@ -2,7 +2,7 @@
   <PropertyGroup>
     <Version>3.0.54016</Version>
     <FileVersion>3.0.54016.0</FileVersion>
-    <LangVersion>latest</LangVersion>
+    <LangVersion>12.0</LangVersion>
     <DebugType>embedded</DebugType>
 
     <RepositoryType>git</RepositoryType>