lib: enable dot-notation eslint rule

PR-URL: #18007
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Eugene Ostroukhov <eostroukhov@google.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Jon Moss <me@jonathanmoss.me>

lib/.eslintrc.yaml

@@ -1,4 +1,6 @@
 rules:
+  dot-notation: error
+
   # Custom rules in tools/eslint-rules
   require-buffer: error
   buffer-constructor: error

lib/inspector.js

@@ -68,7 +68,7 @@ class Session extends EventEmitter {
     const id = this[nextIdSymbol]++;
     const message = { id, method };
     if (params) {
-      message['params'] = params;
+      message.params = params;
     }
     if (callback) {
       this[messageCallbacksSymbol].set(id, callback);

lib/module.js

@@ -729,7 +729,7 @@ Module._initPaths = function() {
     paths.unshift(path.resolve(homeDir, '.node_modules'));
   }
 
-  var nodePath = process.env['NODE_PATH'];
+  var nodePath = process.env.NODE_PATH;
   if (nodePath) {
     paths = nodePath.split(path.delimiter).filter(function(path) {
       return !!path;