simplify test slightly, add test for reserved words

test/validator/samples/properties-computed-cannot-be-reserved/errors.json

@@ -0,0 +1,9 @@
+[{
+	"message":
+		"Computed property name 'new' is invalid — cannot be a JavaScript reserved word",
+	"loc": {
+		"line": 9,
+		"column": 3
+	},
+	"pos": 87
+}]

test/validator/samples/properties-computed-cannot-be-reserved/input.html

@@ -0,0 +1,12 @@
+<script>
+	export default {
+		data() {
+			return {
+				a: 1
+			};
+		},
+		computed: {
+			new: a => a * 2
+		}
+	};
+</script>

test/validator/samples/properties-computed-must-be-valid-function-names/errors.json

@@ -1,8 +1,8 @@
 [{
-	"message": "Computed property name 'hours-hyphen' is invalid — must be a valid identifier such as hours_hyphen",
+	"message": "Computed property name 'with-hyphen' is invalid — must be a valid identifier such as with_hyphen",
 	"loc": {
-		"line": 14,
+		"line": 9,
 		"column": 3
 	},
-	"pos": 150
+	"pos": 87
 }]

test/validator/samples/properties-computed-must-be-valid-function-names/input.html

@@ -1,17 +1,12 @@
-<p>
-	The hour is
-	<strong>{{hours}}</strong>
-</p>
-
 <script>
 	export default {
 		data() {
 			return {
-				time: new Date()
+				a: 1
 			};
 		},
 		computed: {
-			"hours-hyphen": time => time.getHours()
+			"with-hyphen": a => a * 2
 		}
 	};
 </script>