Fix number matching in kv and all extending languages

Author: Tewan

syntaxes/keyvalue3.tmLanguage.json

@@ -30,7 +30,7 @@
 		},
 		"number": {
 			"name": "constant.numeric.keyvalue3",
-			"match": "\\b[0-9]+(.[0-9]+)?\\b"
+			"match": "-?[0-9]+(.[0-9]+)?"
 		},
 		"stringUnquoted": {
 			"name": "string.unquoted.keyvalue3",