Fix eslint and prettier "quotes" style

PR-URL: #184

Author: tshemsedinov

.eslintrc.json

@@ -19,7 +19,10 @@
     ],
     "quotes": [
       "error",
-      "single"
+      "single",
+      {
+        "allowTemplateLiterals": true
+      }
     ],
     "semi": [
       "error",

lib/application.js

@@ -52,7 +52,7 @@ class Application extends events.EventEmitter {
     try {
       const code = await fsp.readFile(fileName, 'utf8');
       if (!code) return null;
-      const src = '\'use strict\';\ncontext => ' + code;
+      const src = `'use strict';\ncontext => ${code}`;
       const options = { filename: fileName, lineOffset: -1 };
       const script = new vm.Script(src, options);
       return script.runInContext(this.sandbox, SCRIPT_OPTIONS);

lib/client.js

@@ -19,9 +19,9 @@ const HEADERS = {
   'Strict-Transport-Security': 'max-age=31536000; includeSubdomains; preload',
   'Access-Control-Allow-Origin': '*',
   'Content-Security-Policy': [
-    'default-src \'self\'',
-    'style-src \'self\' https://fonts.googleapis.com',
-    'font-src \'self\' https://fonts.gstatic.com',
+    `default-src 'self'`,
+    `style-src 'self' https://fonts.googleapis.com`,
+    `font-src 'self' https://fonts.gstatic.com`,
   ].join('; '),
 };