Modified appveyor.yml script to only build branch prerelease-v1.3 (and not tags)

Author: end2endzone

appveyor.yml

@@ -14,6 +14,14 @@ version: 1.3.{build}
 # you can use {branch} name in version format too
 # version: 1.0.{build}-{branch}
 
+# branches to build
+branches:
+  only:
+    - prerelease-v1.3
+
+# Do not build on tags (GitHub and BitBucket)
+skip_tags: true
+
 #---------------------------------#
 #    environment configuration    #
 #---------------------------------#