Ruby: support Proc.new alongside 'proc' and 'lambda'

Author: asgerf

ruby/ql/lib/codeql/ruby/dataflow/internal/DataFlowPrivate.qll

@@ -1333,7 +1333,12 @@ predicate lambdaCreation(Node creation, LambdaCallKind kind, DataFlowCallable c)
     creation.asExpr() =
       any(CfgNodes::ExprNodes::MethodCallCfgNode mc |
         c.asCallable() = mc.getBlock().getExpr() and
-        mc.getExpr().getMethodName() = ["lambda", "proc"]
+        (
+          mc.getExpr().getMethodName() = ["lambda", "proc"]
+          or
+          mc.getExpr().getMethodName() = "new" and
+          mc.getReceiver().getExpr().(ConstantReadAccess).getAQualifiedName() = "Proc"
+        )
       )
   )
 }

ruby/ql/test/library-tests/dataflow/api-graphs/VerifyApiGraphExpectations.expected

@@ -1,3 +1,2 @@
 failures
 testFailures
-| explicit-proc.rb:10:7:10:78 | # $ reachableFromSource=Member[Foo].Method[bar].Argument[0].Parameter[0] | Missing result:reachableFromSource=Member[Foo].Method[bar].Argument[0].Parameter[0] |