update version string (builtin plugins need proper version) (#64)

Author: lovromazgon

spec.go

@@ -21,7 +21,7 @@ import (
 // version is set during the build process (i.e. the Makefile).
 // It follows Go's convention for module version, where the version
 // starts with the letter v, followed by a semantic version.
-var version = "v0.0.0-dev"
+var version = "v0.3.0"
 
 func Specification() sdk.Specification {
 	return sdk.Specification{