Conform to new react and typescript eslint rules

src/components/structures/NonUrgentToastContainer.tsx

@@ -51,14 +51,14 @@ export default class NonUrgentToastContainer extends React.PureComponent<IProps,
         const toasts = this.state.toasts.map((t, i) => {
             return (
                 <div className="mx_NonUrgentToastContainer_toast" key={`toast-${i}`}>
-                    {React.createElement(t, {})}
+                    { React.createElement(t, {}) }
                 </div>
             );
         });
 
         return (
             <div className="mx_NonUrgentToastContainer" role="alert">
-                {toasts}
+                { toasts }
             </div>
         );
     }