Bump snakeyaml to 2.0 and groovy-all to 3.0.15 (#157)

Signed-off-by: Rishabh Singh <[email protected]>

build.gradle

@@ -21,9 +21,9 @@ repositories {
 
 dependencies {
     testImplementation group: 'junit', name: 'junit', version: '4.13.2'
-    implementation group: 'org.codehaus.groovy', name: 'groovy-all', version: '3.0.14', ext: 'pom'
+    implementation group: 'org.codehaus.groovy', name: 'groovy-all', version: '3.0.15', ext: 'pom'
     implementation group: 'com.cloudbees', name: 'groovy-cps', version: '1.31'
-    testImplementation group: 'org.yaml', name: 'snakeyaml', version: '1.33'
+    testImplementation group: 'org.yaml', name: 'snakeyaml', version: '2.0'
     testImplementation group: 'org.assertj', name: 'assertj-core', version: '3.4.1'
     testImplementation group: 'com.lesfurets', name:'jenkins-pipeline-unit', version: '1.13'
 }