Syntax highlighting fixes (#593)

syntaxes/GDScript.tmLanguage.json

@@ -74,6 +74,7 @@
 				{ "include": "#function_call" },
 				{ "include": "#comment" },
 				{ "include": "#self" },
+				{ "include": "#func" },
 				{ "include": "#letter" },
 				{ "include": "#numbers" },
 				{ "include": "#builtin_classes" },
@@ -149,6 +150,10 @@
 			"match": "\\bself\\b",
 			"name": "variable.language.gdscript"
 		},
+		"func": {
+			"match": "\\bfunc\\b",
+			"name": "keyword.language.gdscript"
+		},
 		"logic_operator": {
 			"match": "\\b(and|or|not|!)\\b",
 			"name": "keyword.operator.wordlike.gdscript"
@@ -238,6 +243,14 @@
 			},
 			"end": "$|;",
 			"patterns": [
+				{
+					"match": "(:)?\\s*(set|get)\\s+=\\s+([a-zA-Z_]\\w*)",
+					"captures": {
+						"1": { "name": "punctuation.separator.annotation.gdscript" },
+						"2": { "name": "keyword.language.gdscript storage.type.const.gdscript" },
+						"3": { "name": "entity.name.function.gdscript" }
+					}
+				},
 				{
 					"match": ":=|=(?!=)",
 					"name": "keyword.operator.assignment.gdscript"