Get type checking from OlmMachine.shareRoomKey

[AndrewFerr]

Update the rust-sdk bindings to have access to type checking in the return value of OlmMachine.shareRoomKey, which now returns an array of ToDeviceRequest objects instead of a JSON encoding of the whole array.

Signed-off-by: Andrew Ferrazzutti [email protected]

Checklist

• [x] Tests written for all new code
• [x] Linter has been satisfied
• [x] Sign-off given on the changes (see CONTRIBUTING.md)

[AndrewFerr]

Note that this applies on top of https://github.com/turt2live/matrix-bot-sdk/pull/332 due to incrementing the rust-sdk version from that PR.