[WPB-11973] Freeze API version 7, create dev API version 8.

[fisx]

Checklist

• Add a new entry in an appropriate subdirectory of changelog.d
• Read and follow https://docs.wire.com/developer/developer/api-versioning.html#version-bump-checklist
• Read and follow the PR guidelines

[fisx]

some of the current failures:

----- Events.testConsumeEventsAckNewEventWithoutAckingOldOne FAIL (10.07 s) -----
assertion failure:
No event received for 1s

call stack:
1. assertFailure at test/Test/Events.hs:418

2. assertEvent at test/Test/Events.hs:176


----- Events.testConsumeEventsAcks FAIL (10.06 s) -----
assertion failure:
No event received for 1s

call stack:
1. assertFailure at test/Test/Events.hs:418

2. assertEvent at test/Test/Events.hs:127


----- Events.testChannelLimit FAIL (12.79 s) -----
assertion failure:
No event received for 1s

call stack:
1. assertFailure at test/Test/Events.hs:418

2. assertEvent at test/Test/Events.hs:321

3. k at test/Testlib/ModService.hs:52

4. withModifiedBackend at test/Test/Events.hs:302


----- Events.testConsumeEventsForDifferentUsers FAIL (10.15 s) -----
assertion failure:
No event received for 1s

call stack:
1. assertFailure at test/Test/Events.hs:418

2. assertEvent at test/Test/Events.hs:79

3. assertClientAdd at test/Test/Events.hs:74


----- Events.testConsumeEventsMultipleAcks FAIL (10.08 s) -----
assertion failure:
No event received for 1s

call stack:
1. assertFailure at test/Test/Events.hs:418

2. assertEvent at test/Test/Events.hs:152


----- Events.testConsumeEventsOneWebSocket FAIL (10.06 s) -----
assertion failure:
No event received for 1s

call stack:
1. assertFailure at test/Test/Events.hs:418

2. assertEvent at test/Test/Events.hs:36


----- Events.testConsumeEventsWhileHavingLegacyClients FAIL (10.12 s) -----
assertion failure:
No event received for 1s

call stack:
1. assertFailure at test/Test/Events.hs:418

2. assertEvent at test/Test/Events.hs:110


----- Events.testEventsDeadLettered FAIL (13.04 s) -----
assertion failure:
No event received for 1s

call stack:
1. assertFailure at test/Test/Events.hs:418

2. assertEvent at test/Test/Events.hs:218

3. k at test/Testlib/ModService.hs:52

4. withModifiedBackend at test/Test/Events.hs:203

[fisx]

looks good to me! if somebody can review for the green mark, we're ok to merge.

[stefanwire]

Would be better with one more independent review.

[fisx]

talked to stefan and we agreed we're good!