Update expired NuGet API key. (#26)

Author: Choc13

appveyor.yml

@@ -21,7 +21,7 @@ nuget:
 deploy:
 - provider: NuGet
   api_key:
-    secure: CxMH3k6k/Rpz1zjToGDAelLWDT/gDqRo08iEUAQsRnL+WRo+4TL5gLiNEUy/GfUy
+    secure: vrX7uDkbJriNmYo0JBoY5/UZu22Cxx/a/omaF+X824kAMFvNXODTFPqXqT3le8Nu
   on:
     branch:
     - master