Use snapshot of base and plugin

Author: jameskleeh

grails-bom/profiles.properties

@@ -1,9 +1,9 @@
 rest-api=4.0.0.RC1
-base=4.0.0.RC4
+base=4.0.0.BUILD-SNAPSHOT
 web=4.0.0.RC1
 react=3.0.0.RC2
 vue=2.0.0.RC3
-plugin=4.0.0.RC1
+plugin=4.0.0.BUILD-SNAPSHOT
 profile=4.0.1
 rest-api-plugin=4.0.0.RC1
 web-plugin=4.0.0.RC1