Make functions be able to call themselves

src/Parser/Parser.cpp

@@ -344,6 +344,7 @@ ParsedExpression *Parser::ParseFunctionCallExpression(ParsedExpression* function
             return new BadExpression(peeked->GetStartPosition(), peeked->GetLength());
         }
     }
+    this -> Next();
     auto start = functionExpression->GetStartPosition();
     return new FunctionCallExpression(functionExpression, parameters, start, peeked->GetEndPosition() - start);
 }