Update for Grails 4

[jnunderwood]

This plugin cannot be used in a Grails 4 project yet. There is an error on app startup:

java.lang.NoClassDefFoundError: org/springframework/boot/actuate/health/DataSourceHealthIndicator
        at grails.plugin.appinfo.GrailsAppinfoGrailsPlugin$_doWithSpring_closure1.doCall(GrailsAppinfoGrailsPlugin.groovy:67)

Grails 4 now uses Spring Boot 2 and I think DataSourceHealthIndicator has changed packages to org.springframework.boot.actuate.jdbc. Obviously, there may be other, as yet unknown, issues as well when upgrading the plugin to Grails 4.

[luisenricke]

I had the same problem too