Remove @typescript-eslint/require-await rule exception

[MAILPOET-3201]

.eslintrc.ts.json

@@ -40,7 +40,6 @@
     "@typescript-eslint/unbound-method":  "off",
     "@typescript-eslint/no-unused-vars": "off",
     "@typescript-eslint/no-use-before-define": "off",
-    "@typescript-eslint/require-await": "off",
     "@typescript-eslint/camelcase": "off",
     // PropTypes
     "react/prop-types": 0,

assets/js/src/common/set_from_address_modal.tsx

@@ -7,7 +7,11 @@ import { GlobalContext } from 'context';
 
 const mailPoetApiVersion = (window as any).mailpoet_api_version as string;
 
-const handleSave = async (address: string | null) => MailPoet.Ajax.post({
+/**
+ * @param {string|null} address
+ * @returns {Promise}
+ */
+const handleSave = (address: string | null) => MailPoet.Ajax.post({
   api_version: mailPoetApiVersion,
   endpoint: 'settings',
   action: 'setAuthorizedFromAddress',