Add GDScript export hint for real numbers with easing `export(float, EASE)`

modules/gdscript/gd_parser.cpp

@@ -2421,6 +2421,16 @@ void GDParser::_parse_class(ClassNode *p_class) {
 								}; //fallthrough to use the same
 								case Variant::REAL: {
 
+									if (tokenizer->get_token()==GDTokenizer::TK_IDENTIFIER && tokenizer->get_token_identifier()=="EASE") {
+										current_export.hint=PROPERTY_HINT_EXP_EASING;
+										tokenizer->advance();
+										if (tokenizer->get_token()!=GDTokenizer::TK_PARENTHESIS_CLOSE) {
+											_set_error("Expected ')' in hint.");
+											return;
+										}
+										break;
+									}
+
 									float sign=1.0;
 
 									if (tokenizer->get_token()==GDTokenizer::TK_OP_SUB) {