+ try: fix AppVeyor NuGet packages restore

.nuget/NuGet.Config

@@ -1,6 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
+  <packageSources>
+    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
+  </packageSources>
   <solution>
-    <add key="disableSourceControlIntegration" value="true" />
+    <add key="disableSourceControlIntegration" value="false" />
   </solution>
 </configuration>

appveyor.yml

@@ -55,9 +55,6 @@ image:
 init:
   - git config --global core.autocrlf input
 
-cache:
-  - packages -> **\packages.config
-
 # clone directory
 clone_folder: c:\projects\notepad3
 
@@ -137,6 +134,9 @@ configuration:
   - Release
 #  - Debug
 
+cache:
+  - packages -> **\packages.config
+
 build:
   parallel: true
   project: Notepad3.sln