Chore: add a test for #109

Author: mysticatea

tests/fixtures/no-unsupported-features/without-node/package.json

@@ -0,0 +1,7 @@
+{
+    "private": true,
+    "name": "test",
+    "engines": {
+        "vscode": "foo"
+    }
+}

tests/lib/rules/no-unsupported-features.js

@@ -1283,6 +1283,11 @@ ruleTester.run("no-unsupported-features", rule, [
             parserOptions: { ecmaVersion: 2017 },
             options: ["7.10.0"],
         },
+        {
+            filename: fixture("without-node/a.js"),
+            code: "var a = () => 1",
+            env: { es6: true },
+        },
     ],
     invalid: [
         {