* tests: Cross-signing keys support in `E2EKeyReceiver`
Have `E2EKeyReceiver` collect uploaded cross-signing keys, so that they can be
returned by `E2EKeyResponder`.
* tests: Signature upload support in `E2EKeyReceiver`
Have `E2EKeyReceiver` collect uploaded device signatures, so that they can be
returned by `E2EKeyResponder`.
* tests: Implement `E2EOTKClaimResponder` class
A new test helper, which intercepts `/keys/claim`, allowing clients under test
to claim OTKs uploaded by other devices.
* Expose experimental settings for encrypted history sharing
Add options to `MatrixClient.invite` and `MatrixClient.joinRoom` to share and
accept encrypted history on invite, per MSC4268.
* Clarify pre-join-membership logic
* Improve tests
* Update spec/integ/crypto/cross-signing.spec.ts
Co-authored-by: Hubert Chathi <hubertc@matrix.org>
---------
Co-authored-by: Hubert Chathi <hubertc@matrix.org>
