Bump deps and use npm7

Signed-off-by: John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>

Author: skjnldsv

.eslintrc.js

@@ -1,14 +1,16 @@
 module.exports = {
 	extends: [
-		'@nextcloud'
+		'@nextcloud',
 	],
 	globals: {
+		__webpack_nonce__: true,
+		__webpack_public_path__: true,
+		appName: true,
+		appVersion: true,
 		expect: true,
 		OC: true,
 		OCA: true,
 		OCP: true,
 		t: true,
-		__webpack_public_path__: true,
-		__webpack_nonce__: true,
-	}
+	},
 }

babel.config.js

@@ -1,15 +1,3 @@
-module.exports = {
-	plugins: [
-		'@babel/plugin-syntax-dynamic-import'
-	],
-	presets: [
-		[
-			'@babel/preset-env',
-			{
-				modules: process.env.NODE_ENV === 'testing' ? 'commonjs' : undefined,
-				useBuiltIns: process.env.NODE_ENV === 'testing' ? 'usage' : 'entry',
-				corejs: 3
-			}
-		]
-	]
-};
+const babelConfig = require('@nextcloud/babel-config')
+
+module.exports = babelConfig

lib/Dashboard/MailWidget.php

@@ -89,7 +89,7 @@ public function getUrl(): ?string {
 	 * @inheritDoc
 	 */
 	public function load(): void {
-		Util::addScript(Application::APP_ID, 'dashboard');
+		Util::addScript(Application::APP_ID, 'mail-dashboard');
 
 		$this->initialState->provideInitialState(
 			'mail-accounts',