Bump to alpha2

Author: Jeavon

appveyor.yml

@@ -9,7 +9,7 @@ cache:
 # UMBRACO_PACKAGE_PRERELEASE_SUFFIX if a rtm release build this should be blank, otherwise if empty will default to alpha
 # example UMBRACO_PACKAGE_PRERELEASE_SUFFIX=beta
 init:
-  - set UMBRACO_PACKAGE_PRERELEASE_SUFFIX=alpha1
+  - set UMBRACO_PACKAGE_PRERELEASE_SUFFIX=alpha2
 
 install:
   - ps: >-