try with later version

Author: anutosh491

unittests/CppInterOp/InterpreterTest.cpp

@@ -68,8 +68,11 @@ TEST(InterpreterTest, Evaluate) {
   //EXPECT_TRUE(Cpp::Evaluate(I, "__cplusplus;") == 201402);
   // Due to a deficiency in the clang-repl implementation to get the value we
   // always must omit the ;
-  Cpp::CreateInterpreter();
-  EXPECT_TRUE(Cpp::Evaluate("__cplusplus") == 201402);
+  std::vector<const char*> Args = {
+    "-std=c++20"
+  };
+  Cpp::CreateInterpreter(Args);
+  EXPECT_TRUE(Cpp::Evaluate("__cplusplus") == 202002);
 
   bool HadError;
   EXPECT_TRUE(Cpp::Evaluate("#error", &HadError) == (intptr_t)~0UL);