Update Grails Forge to list Grails 5

Author: puneetbehl

build.gradle

@@ -45,6 +45,7 @@ dependencies {
     compile "org.springframework.boot:spring-boot-cli:$springBootVersion"
 
     compile "org.grails:grails-web-boot"
+    compile "org.grails:grails-shell:4.0.9"
     compile "org.grails:grails-logging"
     compile "org.grails:grails-plugin-rest"
     compile "org.grails:grails-plugin-databinding"

src/main/groovy/appgenerator/GrailsVersionService.groovy

@@ -10,7 +10,7 @@ import javax.inject.Singleton
 class GrailsVersionService {
 
     final static GrailsVersion LOWEST_32X = GrailsVersion.build("3.2.2")
-    final static GrailsVersion HIGHEST_40X = GrailsVersion.build("4.0.99")
+    final static GrailsVersion HIGHEST_40X = GrailsVersion.build("5.0.99")
     final static String MAVEN_METADATA= 'https://repo.grails.org/grails/core/org/grails/grails-core/maven-metadata.xml'
     final static String MAVEN_METADATA_OSS = 'https://repo1.maven.org/maven2/org/grails/grails-core/maven-metadata.xml'