Force a reference on FSharp.Core even if the version is downgraded otherwise LSP project doesn't compile...

Author: MangelMaxime

src/FSharpLanguageServer/FSharpLanguageServer.fsproj

@@ -19,6 +19,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="FSharp.Core" Version="5.0.1" />
     <PackageReference Include="FSharp.Compiler.Service" Version="39.0.0" />
     <PackageReference Include="HtmlAgilityPack" Version="1.8.4" />
   </ItemGroup>

src/LSP/LSP.fsproj

@@ -15,5 +15,6 @@
 
   <ItemGroup>
     <PackageReference Include="FSharp.Data" Version="4.0.1" />
+    <PackageReference Include="FSharp.Core" Version="5.0.1" />
   </ItemGroup>
 </Project>

src/ProjectCracker/ProjectCracker.fsproj

@@ -15,6 +15,7 @@
     <PackageReference Include="System.Security.Principal" Version="4.3.0" />
     <PackageReference Include="System.IO.FileSystem.Primitives" Version="4.3.0" />
     <PackageReference Include="System.IO.FileSystem" Version="4.3.0" />
+    <PackageReference Include="FSharp.Core" Version="5.0.1" />
   </ItemGroup>
 
   <ItemGroup>