Update version before merging a new minor version of kotlin

Author: OptimumCode

gradle.properties

@@ -4,7 +4,7 @@ org.gradle.jvmargs=-Xmx1G
 org.gradle.java.installations.auto-download=false
 org.gradle.daemon=false
 
-version=0.3.2-SNAPSHOT
+version=0.4.0-SNAPSHOT
 group=io.github.optimumcode
 
 # Due to large amount of test cases the output for JS WEB exceeds 1MB limit for TeamCity reader