Merge pull request #437 from grails/renovate/snakeyamlversion

Update dependency org.yaml:snakeyaml to v1.30

Author: puneetbehl

gradle.properties

@@ -21,7 +21,7 @@ seleniumSafariDriverVersion=3.14.0
 seleniumVersion=3.14.0
 servletApiVersion=4.0.1
 slf4jVersion=1.7.32
-snakeyamlVersion=1.29
+snakeyamlVersion=1.30
 spockVersion=2.0-groovy-3.0
 springBootVersion=2.6.1
 springVersion=5.3.13