Fix linter errors from CI builds

app/src/components/menu.tsx

@@ -199,7 +199,7 @@ export class Menu extends React.Component<MenuProps, MenuState> {
 
     onSelect: PropTypes.func.isRequired,
 
-    onExpand: PropTypes.func
+    onExpand: PropTypes.func,
     onEscape: PropTypes.func,
 
     defaultSelectedIndex: PropTypes.number,
@@ -303,7 +303,10 @@ export class Menu extends React.Component<MenuProps, MenuState> {
     if (['Enter', 'Return'].includes(event.key)) {
       this._onEnter();
     } else {
-      if (this.props.onExpand !== undefined && (event.key === 'Tab' || event.key === 'ArrowRight')) {
+      if (
+        this.props.onExpand !== undefined &&
+        (event.key === 'Tab' || event.key === 'ArrowRight')
+      ) {
         this._onExpand();
         event.preventDefault();
         return;
@@ -412,13 +415,6 @@ export class Menu extends React.Component<MenuProps, MenuState> {
     }
   };
 
-  _onExpand = () => {
-    const item = this.props.items[this.state.selectedIndex];
-    if (item != null) {
-      this.props.onExpand(item);
-    }
-  };
-
   _onEscape = () => {
     this.props.onEscape();
   };

app/src/flux/stores/database-store.ts

@@ -214,6 +214,7 @@ class DatabaseStore extends MailspringStore {
   // If a query is made before the database has been opened, the query will be
   // held in a queue and run / resolved when the database is ready.
   _query(query: SQLString, values: SQLValue[] = [], background = false) {
+    // eslint-disable-next-line no-async-promise-executor
     return new Promise<{ [key: string]: any }[]>(async (resolve, reject) => {
       if (!this._open) {
         this._waiting.push(() => this._query(query, values).then(resolve, reject));
@@ -367,6 +368,7 @@ class DatabaseStore extends MailspringStore {
       });
     }
 
+    // eslint-disable-next-line no-async-promise-executor
     return new Promise<AgentResponse>(async resolve => {
       if (!this._agent) {
         // Something bad has happened and we were immediately unable to spawn the query helper.