add transform method that is an alias for to_ruby

Author: am0o0

ruby/ql/lib/codeql/ruby/frameworks/Yaml.qll

@@ -41,8 +41,8 @@ private class YamlParseStep extends AdditionalTaintStep {
     exists(API::Node parseSuccessors | parseSuccessors = yamlNode() |
       succ =
         [
-          parseSuccessors.getMethod("to_ruby").getReturn().asSource(),
-          parseSuccessors.getMethod("to_ruby").getReturn().getAnElement().asSource()
+          parseSuccessors.getMethod(["to_ruby", "transform"]).getReturn().asSource(),
+          parseSuccessors.getMethod(["to_ruby", "transform"]).getReturn().getAnElement().asSource()
         ] and
       pred = parseSuccessors.asSource()
     )

ruby/ql/lib/codeql/ruby/security/UnsafeDeserializationCustomizations.qll

@@ -105,7 +105,7 @@ module UnsafeDeserialization {
       exists(API::Node toRubyReceiver |
         toRubyReceiver = yamlNode() and this = toRubyReceiver.asSource()
       |
-        exists(toRubyReceiver.getMethod("to_ruby"))
+        exists(toRubyReceiver.getMethod(["to_ruby", "transform"]))
       )
     }
   }