Upgrade eslint-plugin-matrix-org to 1.2.1

This upgrade came with a number of new lints that needed to be fixed across the code base. Primarily: explicit return types on functions, and explicit visibility modifiers on class members.

src/auth/useRecaptcha.ts

@@ -34,7 +34,11 @@ interface RecaptchaPromiseRef {
   reject: (error: Error) => void;
 }
 
-export const useRecaptcha = (sitekey?: string) => {
+export function useRecaptcha(sitekey?: string): {
+  execute: () => Promise<string>;
+  reset: () => void;
+  recaptchaId: string;
+} {
   const { t } = useTranslation();
   const [recaptchaId] = useState(() => randomString(16));
   const promiseRef = useRef<RecaptchaPromiseRef>();
@@ -42,7 +46,7 @@ export const useRecaptcha = (sitekey?: string) => {
   useEffect(() => {
     if (!sitekey) return;
 
-    const onRecaptchaLoaded = () => {
+    const onRecaptchaLoaded = (): void => {
       if (!document.getElementById(recaptchaId)) return;
 
       window.grecaptcha.render(recaptchaId, {
@@ -90,11 +94,11 @@ export const useRecaptcha = (sitekey?: string) => {
       });
 
       promiseRef.current = {
-        resolve: (value) => {
+        resolve: (value): void => {
           resolve(value);
           observer.disconnect();
         },
-        reject: (error) => {
+        reject: (error): void => {
           reject(error);
           observer.disconnect();
         },
@@ -119,4 +123,4 @@ export const useRecaptcha = (sitekey?: string) => {
   }, []);
 
   return { execute, reset, recaptchaId };
-};
+}