Sort imports from all files

Add "prettier" script in `package.json` to check if all files are
compliant.

Sort all imports and format all files by running `npm run lint -- --fix`
followed by `npm run prettier -- --write`.

Gitlab #29

Change-Id: Id80402d1344c3bc611f66a46cffeee5f2c375bd8
diff --git a/JamiDaemon.js b/JamiDaemon.js
index 587a477..c5d8fbe 100755
--- a/JamiDaemon.js
+++ b/JamiDaemon.js
@@ -19,11 +19,12 @@
  */
 'use strict';
 
-import Account from './model/Account.js';
-import Conversation from './model/Conversation.js';
 import { createRequire } from 'module';
 import path from 'path';
 
+import Account from './model/Account.js';
+import Conversation from './model/Conversation.js';
+
 const require = createRequire(import.meta.url);
 
 class JamiDaemon {