Bump snakeyaml from 1.29 to 1.30

Bumps [snakeyaml](https://bitbucket.org/snakeyaml/snakeyaml) from 1.29 to 1.30.
- [Commits](https://bitbucket.org/snakeyaml/snakeyaml/branches/compare/snakeyaml-1.30..snakeyaml-1.29)

---
updated-dependencies:
- dependency-name: org.yaml:snakeyaml
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

grails-bootstrap/build.gradle

@@ -3,7 +3,7 @@ import org.apache.tools.ant.filters.ReplaceTokens
 dependencies {
     compile ( "org.codehaus.groovy:groovy-xml:$groovyVersion" )
     compile ( "org.codehaus.groovy:groovy-templates:$groovyVersion" )
-    compile "org.yaml:snakeyaml:1.29"
+    compile "org.yaml:snakeyaml:1.30"
 
     compileOnly("io.methvin:directory-watcher:0.15.1")
     compileOnly("org.fusesource.jansi:jansi:$jansiVersion")

grails-docs/build.gradle

@@ -9,7 +9,7 @@ dependencies {
             "org.slf4j:jcl-over-slf4j:$slf4jVersion",
             "org.apache.ant:ant:$antVersion",
             'org.grails:grails-gdoc-engine:1.0.1',
-            'org.yaml:snakeyaml:1.29',
+            'org.yaml:snakeyaml:1.30',
             "org.codehaus.groovy:groovy-ant:$groovyVersion"
 
     compile 'org.asciidoctor:asciidoctorj:2.5.2'