Fix error in Elm Editor when running in Docker 🧹🐛

Integrate new implementations from libgit2/libgit2sharp#1618

With the previous version, in deployments on Docker found the 'load from git' function in the Elm Editor did not work. The backend returned this error with the HTTP response:
```
Exception in volatile host:
System.AggregateException: One or more errors occurred. (The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception.)
 ---> System.TypeInitializationException: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception.
 ---> System.DllNotFoundException: Unable to load shared library 'git2-106a5f2' or one of its dependencies. In order to help diagnose loading problems, consider setting the LD_DEBUG environment variable: libgit2-106a5f2: cannot open shared object file: No such file or directory
   at LibGit2Sharp.Core.NativeMethods.git_libgit2_init()
   at LibGit2Sharp.Core.NativeMethods.InitializeNativeLibrary()
   at LibGit2Sharp.Core.NativeMethods..cctor()
   --- End of inner exception stack trace ---
   at LibGit2Sharp.Core.NativeMethods.git_clone(git_repository*& repo, String origin_url, FilePath workdir_path, GitCloneOptions& opts)
   at LibGit2Sharp.Core.Proxy.git_clone(String url, String workdir, GitCloneOptions& opts)
   at LibGit2Sharp.Repository.Clone(String sourceUrl, String workdirPath, CloneOptions options)
   at Kalmit.LoadFromGithub.LoadFromUrl(String sourceUrl) in /app/PersistentProcess/PersistentProcess.Common/LoadFromGithub.cs:line 109
   at Kalmit.LoadFromPath.LoadTreeFromPath(String path) in /app/PersistentProcess/PersistentProcess.Common/LoadFromPath.cs:line 11
[...]
```

See the discussion of the problem at libgit2/libgit2sharp#1798 and libgit2/libgit2sharp#1747

Another workaround found in the discussion was switching to the bionic flavor of the .net docker image.

Author: Viir

implement/PersistentProcess/PersistentProcess.Common/PersistentProcess.Common.csproj

@@ -8,7 +8,7 @@
     <PackageReference Include="JavaScriptEngineSwitcher.ChakraCore" Version="3.9.1" />
     <PackageReference Include="JavaScriptEngineSwitcher.ChakraCore.Native.linux-x64" Version="3.9.1" />
     <PackageReference Include="JavaScriptEngineSwitcher.ChakraCore.Native.win-x64" Version="3.9.1" />
-    <PackageReference Include="LibGit2Sharp" Version="0.26.2" />
+    <PackageReference Include="LibGit2Sharp" Version="0.27.0-preview-0096" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Scripting" Version="3.6.0" />
     <PackageReference Include="Mono.Posix.NETStandard" Version="1.0.0" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />

implement/PersistentProcess/PersistentProcess.WebHost/Program.cs

@@ -2,6 +2,6 @@ namespace Kalmit.PersistentProcess.WebHost
 {
     public class Program
     {
-        static public string AppVersionId => "2020-12-29";
+        static public string AppVersionId => "2021-01-01";
     }
 }

implement/elm-fullstack/elm-fullstack.csproj

@@ -5,8 +5,8 @@
     <TargetFramework>netcoreapp3.1</TargetFramework>
     <RootNamespace>elm_fullstack</RootNamespace>
     <AssemblyName>elm-fullstack</AssemblyName>
-    <AssemblyVersion>2020.1229.0.0</AssemblyVersion>
-    <FileVersion>2020.1229.0.0</FileVersion>
+    <AssemblyVersion>2021.0101.0.0</AssemblyVersion>
+    <FileVersion>2021.0101.0.0</FileVersion>
   </PropertyGroup>
 
   <PropertyGroup>