gradle.properties: ready for 3.3.0-alpha5 build

Author: stephengold

Diff for: gradle.properties

@@ -3,9 +3,9 @@ jmeVersion = 3.3.0
 # Version used for application and settings folder, no spaces!
 jmeMainVersion = 3.3
 # Version addition: SNAPSHOT, alpha, beta, stable
-jmeVersionTag = alpha4
+jmeVersionTag = alpha5
 # Increment this each time jmeVersionTag changes but jmeVersion stays the same
-jmeVersionTagID = 4
+jmeVersionTagID = 5
 
 # specify if JavaDoc should be built
 buildJavaDoc = true