chore: add strict mode (#2974)

src/util/ActivityFlags.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const BitField = require('./BitField');
 
 /**

src/util/BitField.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const { RangeError } = require('../errors');
 
 /**

src/util/Collection.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const Util = require('./Util');
 
 /**

src/util/Constants.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const Package = exports.Package = require('../../package.json');
 const { Error, RangeError } = require('../errors');
 const browser = exports.browser = typeof window !== 'undefined';

src/util/DataResolver.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const path = require('path');
 const fs = require('fs');
 const fetch = require('node-fetch');

src/util/Permissions.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const BitField = require('./BitField');
 
 /**

src/util/Snowflake.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const Util = require('../util/Util');
 
 // Discord epoch (2015-01-01T00:00:00.000Z)

src/util/Speaking.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const BitField = require('./BitField');
 
 /**

src/util/Structures.js

@@ -1,3 +1,5 @@
+'use strict';
+
 /**
  * Allows for the extension of built-in Discord.js structures that are instantiated by {@link DataStore DataStores}.
  */

src/util/Util.js

@@ -1,3 +1,5 @@
+'use strict';
+
 const { Colors, DefaultOptions, Endpoints } = require('./Constants');
 const fetch = require('node-fetch');
 const { Error: DiscordError, RangeError, TypeError } = require('../errors');