Update .Net Core SDK from 2.1.4 to 2.1.101 (#936)

* Update .Net Core SDK to 2.1.101

* update README.md

Author: bergmeister

README.md

@@ -85,7 +85,7 @@ Exit
 
 ### From Source
 
-* [.NET Core 2.1.4 SDK](https://github.com/dotnet/core/blob/master/release-notes/download-archives/2.0.5-download.md)
+* [.NET Core 2.1.101 SDK](https://www.microsoft.com/net/download/dotnet-core/sdk-2.1.101) or newer
 * [PlatyPS 0.9.0 or greater](https://github.com/PowerShell/platyPS/releases)
 * Optionally but recommended for development: [Visual Studio 2017](https://www.visualstudio.com/downloads/)
 

global.json

@@ -4,6 +4,6 @@
         "Rules"
     ],
     "sdk": {
-        "version": "2.1.4"
+        "version": "2.1.101"
     }
 }