Add @stylistic/eslint-plugin to ESLint configuration.

markdownlint-cli2-action.js

@@ -3,11 +3,11 @@
 "use strict";
 
 const core = require("@actions/core");
-const {"main": markdownlintCli2} = require("markdownlint-cli2");
+const { "main": markdownlintCli2 } = require("markdownlint-cli2");
 
 const logMessage = core.info;
 const outputFormatter = (options) => {
-  const {results} = options;
+  const { results } = options;
   for (const lintError of results) {
     const {
       errorContext,
@@ -64,7 +64,7 @@ const parameters = {
   argv,
   logMessage,
   "optionsOverride": {
-    "outputFormatters": [[outputFormatter]]
+    "outputFormatters": [ [ outputFormatter ] ]
   }
 };
 markdownlintCli2(parameters).then(