Groovy 3.0.19 compatible (#791)

* Update Groovy to 3.0.19

* Make project compatible with Groovy 3.0.19

Author: matrei

gradle.properties

@@ -2,7 +2,7 @@ assetPipelineVersion=3.3.4
 gebVersion=2.3
 gormVersion=8.0.2
 grailsGradlePluginVersion=6.1.0
-groovyVersion=3.0.11
+groovyVersion=3.0.19
 h2Version=1.4.200
 hibernate5Version=5.6.15.Final
 hibernateValidatorVersion=6.2.5.Final

grails-datastore-gorm-hibernate5/src/main/groovy/org/grails/orm/hibernate/AbstractHibernateGormStaticApi.groovy

@@ -771,7 +771,7 @@ abstract class AbstractHibernateGormStaticApi<D> extends GormStaticApi<D> {
 
     protected List<String> removeNullNames(Map query) {
         List<String> nullNames = []
-        Set<String> allNames = new HashSet<String>(query.keySet())
+        Set<String> allNames = new HashSet<>(query.keySet() as Set<String>)
         for (String name in allNames) {
             if (query[name] == null) {
                 query.remove name