Adapt for js-sdk MatrixClient conversion to TS

For https://github.com/matrix-org/matrix-js-sdk/pull/1718

src/stores/CommunityPrototypeStore.ts

@@ -126,7 +126,7 @@ export class CommunityPrototypeStore extends AsyncStoreWithClient<IState> {
             if (membership === EffectiveMembership.Invite) {
                 try {
                     const path = utils.encodeUri("/rooms/$roomId/group_info", {$roomId: room.roomId});
-                    const profile = await this.matrixClient._http.authedRequest(
+                    const profile = await this.matrixClient.http.authedRequest(
                         undefined, "GET", path,
                         undefined, undefined,
                         {prefix: "/_matrix/client/unstable/im.vector.custom"});

src/stores/SetupEncryptionStore.js

@@ -196,7 +196,7 @@ export class SetupEncryptionStore extends EventEmitter {
         this.phase = PHASE_FINISHED;
         this.emit("update");
         // async - ask other clients for keys, if necessary
-        MatrixClientPeg.get()._crypto.cancelAndResendAllOutgoingKeyRequests();
+        MatrixClientPeg.get().crypto.cancelAndResendAllOutgoingKeyRequests();
     }
 
     async _setActiveVerificationRequest(request) {