Fix playwright flakes due to floating promises (#28981)

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

playwright/e2e/crypto/device-verification.spec.ts

@@ -212,7 +212,7 @@ test.describe("Device verification", { tag: "@no-webkit" }, () => {
         /* on the bot side, wait for the verifier to exist ... */
         const verifier = await awaitVerifier(botVerificationRequest);
         // ... confirm ...
-        botVerificationRequest.evaluate((verificationRequest) => verificationRequest.verifier.verify());
+        void botVerificationRequest.evaluate((verificationRequest) => verificationRequest.verifier.verify());
         // ... and then check the emoji match
         await doTwoWaySasVerification(page, verifier);
 

playwright/e2e/crypto/user-verification.spec.ts

@@ -74,7 +74,7 @@ test.describe("User verification", () => {
         /* on the bot side, wait for the verifier to exist ... */
         const botVerifier = await awaitVerifier(bobVerificationRequest);
         // ... confirm ...
-        botVerifier.evaluate((verifier) => verifier.verify());
+        void botVerifier.evaluate((verifier) => verifier.verify());
         // ... and then check the emoji match
         await doTwoWaySasVerification(page, botVerifier);
 

playwright/e2e/crypto/utils.ts

@@ -59,7 +59,7 @@ export function handleSasVerification(verifier: JSHandle<Verifier>): Promise<Emo
         return new Promise<EmojiMapping[]>((resolve) => {
             const onShowSas = (event: ShowSasCallbacks) => {
                 verifier.off("show_sas" as VerifierEvent, onShowSas);
-                event.confirm();
+                void event.confirm();
                 resolve(event.sas.emoji);
             };
 
@@ -313,7 +313,7 @@ export async function autoJoin(client: Client) {
     await client.evaluate((cli) => {
         cli.on(window.matrixcs.RoomMemberEvent.Membership, (event, member) => {
             if (member.membership === "invite" && member.userId === cli.getUserId()) {
-                cli.joinRoom(member.roomId);
+                void cli.joinRoom(member.roomId);
             }
         });
     });