Fix incorrect precedence of pow operator in GDScript

modules/gdscript/gdscript_parser.cpp

@@ -3273,7 +3273,7 @@ GDScriptParser::ParseRule *GDScriptParser::get_rule(GDScriptTokenizer::Token::Ty
 		{ &GDScriptParser::parse_unary_operator,         	&GDScriptParser::parse_binary_operator,      	PREC_ADDITION_SUBTRACTION }, // PLUS,
 		{ &GDScriptParser::parse_unary_operator,         	&GDScriptParser::parse_binary_operator,      	PREC_ADDITION_SUBTRACTION }, // MINUS,
 		{ nullptr,                                          &GDScriptParser::parse_binary_operator,      	PREC_FACTOR }, // STAR,
-		{ nullptr,                                          &GDScriptParser::parse_binary_operator,      	PREC_FACTOR }, // STAR_STAR,
+		{ nullptr,                                          &GDScriptParser::parse_binary_operator,      	PREC_POWER }, // STAR_STAR,
 		{ nullptr,                                          &GDScriptParser::parse_binary_operator,      	PREC_FACTOR }, // SLASH,
 		{ nullptr,                                          &GDScriptParser::parse_binary_operator,      	PREC_FACTOR }, // PERCENT,
 		// Assignment

modules/gdscript/gdscript_parser.h

@@ -1265,6 +1265,7 @@ private:
 		PREC_FACTOR,
 		PREC_SIGN,
 		PREC_BIT_NOT,
+		PREC_POWER,
 		PREC_TYPE_TEST,
 		PREC_AWAIT,
 		PREC_CALL,