Fix grails version. should be 2.4.3. When 2.4.2 release, version was not...

... bumped from 2.4.1 to 2.4.2. Then when

2.4.3 was released, version was just bumped by +1 from 2.4.1 to 2.4.2. Should be 2.4.3.

I guess the plugin should actually be 2.4.3.1 now? Not sure what you want to do.