add namespace tests

test/validator/samples/namespace-invalid-unguessable/errors.json

@@ -0,0 +1,8 @@
+[{
+	"message": "Invalid namespace 'lol'",
+	"pos": 29,
+	"loc": {
+		"line": 3,
+		"column": 2
+	}
+}]

test/validator/samples/namespace-invalid-unguessable/input.html

@@ -0,0 +1,5 @@
+<script>
+	export default {
+		namespace: 'lol'
+	};
+</script>

test/validator/samples/namespace-non-literal/errors.json

@@ -0,0 +1,8 @@
+[{
+	"message": "The 'namespace' property must be a string literal representing a valid namespace",
+	"pos": 79,
+	"loc": {
+		"line": 5,
+		"column": 2
+	}
+}]

test/validator/samples/namespace-non-literal/input.html

@@ -0,0 +1,7 @@
+<script>
+	const namespace = 'http://www.w3.org/1999/svg';
+
+	export default {
+		namespace
+	};
+</script>