Change language config enable all to null

config.example.json

@@ -5,7 +5,7 @@
         "Language whitelist, e.g.",
         "haskell",
         "python",
-        "Leave empty to enable all languages"
+        "Change to null to enable all languages"
     ],
     "memory": "128m",
     "cpus": "0.5",

src/struct/LanguageHandler.js

@@ -12,7 +12,7 @@ class LanguageHandler extends AkairoHandler {
         extensions = ['.js', '.ts'],
         automateCategories,
         loadFilter = filepath =>
-            !this.client.config.languages.length || this.client.config.languages.includes(path.parse(filepath).name)
+            !this.client.config.languages || this.client.config.languages.includes(path.parse(filepath).name)
     }) {
         super(client, {
             directory,