Enable @typescript-eslint/explicit-function-return-type in /src (#9788)

* Enable `@typescript-eslint/explicit-member-accessibility` on /src

* Prettier

* Enable `@typescript-eslint/explicit-function-return-type` in /src

* Fix types

* tsc strict fixes

* Delint

* Fix test

* Fix bad merge

src/utils/beacon/geolocation.ts

@@ -132,9 +132,9 @@ export const watchPosition = (
     onWatchPositionError: (error: GeolocationError) => void,
 ): ClearWatchCallback => {
     try {
-        const onError = (error) => onWatchPositionError(mapGeolocationError(error));
+        const onError = (error): void => onWatchPositionError(mapGeolocationError(error));
         const watchId = getGeolocation().watchPosition(onWatchPosition, onError, GeolocationOptions);
-        const clearWatch = () => {
+        const clearWatch = (): void => {
             getGeolocation().clearWatch(watchId);
         };
         return clearWatch;

src/utils/beacon/useOwnLiveBeacons.ts

@@ -69,7 +69,7 @@ export const useOwnLiveBeacons = (liveBeaconIds: BeaconIdentifier[]): LiveBeacon
         .sort(sortBeaconsByLatestExpiry)
         .shift();
 
-    const onStopSharing = async () => {
+    const onStopSharing = async (): Promise<void> => {
         setStoppingInProgress(true);
         try {
             await Promise.all(liveBeaconIds.map((beaconId) => OwnBeaconStore.instance.stopBeacon(beaconId)));
@@ -78,7 +78,7 @@ export const useOwnLiveBeacons = (liveBeaconIds: BeaconIdentifier[]): LiveBeacon
         }
     };
 
-    const onResetLocationPublishError = () => {
+    const onResetLocationPublishError = (): void => {
         liveBeaconIds.forEach((beaconId) => {
             OwnBeaconStore.instance.resetLocationPublishError(beaconId);
         });