Disabled 'prerelease' tag on NuGet and bump version to v0.2.3.

Author: hozuki

.travis.yml

@@ -5,7 +5,7 @@ language: csharp
 solution: MilliSim.sln
 
 env:
-  - MAIN_VER=0.2.2 SOLUTION_NAME=MilliSim.sln CONFIGURATION=Release RELEASE_SUFFIX=-alpha
+  - MAIN_VER=0.2.3 SOLUTION_NAME=MilliSim.sln CONFIGURATION=Release RELEASE_SUFFIX=-alpha
 
 before_install:
   - sudo apt-get install -y gtk-sharp2 p7zip-full nodejs npm

appveyor.yml

@@ -1,6 +1,6 @@
 # https://www.appveyor.com/docs/appveyor-yml/
 
-version: 0.2.2.{build}
+version: 0.2.3.{build}
 image: Visual Studio 2017
 platform:
   - Any CPU

scripts/appveyor_nuget_pack.js

@@ -51,9 +51,9 @@ function packPackages(err, fileList) {
             "-OutputDirectory", winpath(process.cwd()),
             "-Prop", `Configuration=${process.env["CONFIGURATION"]};Platform=AnyCPU;OutputPath=${winpath(getOutputPath(dir))}`
         ];
-        if (process.env["Release_Suffix"]) {
-            params.push("-Suffix", process.env["Release_Suffix"].replace("-", ""));
-        }
+        //if (process.env["Release_Suffix"]) {
+        //    params.push("-Suffix", process.env["Release_Suffix"].replace("-", ""));
+        //}
         const stdout = child_process.execFileSync("nuget", params, {
             cwd: dir,
             env: process.env