Prepare RTM of AvalonEdit 6.0

Author: christophwille

ChangeLog.md

@@ -1,6 +1,6 @@
 Note: this changelog only lists major changes and fixes for major bugs. For a complete list of changes, see the git log.
 
-tbd: AvalonEdit 6.0
+2019/09/24: AvalonEdit 6.0
 * Add support for .NET Core 3.0
 * Remove support for .NET 3.5
 * Add proper .editorconfig and fix formatting

appveyor.yml

@@ -3,7 +3,7 @@ version: '6.0.{build}'
 dotnet_csproj:
   patch: true
   file: '**\*.csproj'
-  version: '6.0-rc1'
+  version: '6.0'
   assembly_version: '{version}'
   file_version: '{version}'
 
@@ -14,7 +14,7 @@ configuration:
 image: Visual Studio 2019
 
 install:
-  - cmd: choco install dotnetcore-sdk --pre
+  - cmd: choco install dotnetcore-sdk
 
 before_build:
   - nuget restore ICSharpCode.AvalonEdit.sln

global.json

@@ -1,5 +1,5 @@
 {
   "sdk": {
-    "version": "3.0.100-rc1"
+    "version": "3.0.100"
   }
 }