Merge pull request #385 from grails/renovate/grailsgradlepluginversion

Update dependency org.grails:grails-gradle-plugin to v5.0.0-RC4

Author: puneetbehl

gradle.properties

@@ -3,7 +3,7 @@ chromeDriverVersion=2.44
 gebVersion=2.3
 geckodriverVersion=0.23.0
 gormVersion=7.1.0-SNAPSHOT
-grailsGradlePluginVersion=5.0.0-RC3
+grailsGradlePluginVersion=5.0.0-RC4
 groovyVersion=3.0.7
 h2Version=1.4.200
 hibernate5Version=5.5.7.Final