Using MatrixClient with RustSdkCryptoStorageProvider fails with an error

[urmaul]

Describe the bug
Trying to run and use MatrixClient with RustSdkCryptoStorageProvider fails with an error.

To Reproduce
Steps to reproduce the behavior:

1. Create RustSdkCryptoStorageProvider pointing to an empty directory
2. Initialize MatrixClient
3. Try to send or receive a message
4. See error

Expected behavior
Either sending and recieving messages works or I see a meaningful error message.

Log snippet
I've got this error when trying to send a message:

MatrixHttpClient (REQ-6) { errcode: 'M_NOT_FOUND', error: 'Event not found.' }
MatrixClientLite Error handling sync Error: invalid type: map, expected a sequence at line 1 column 0
MatrixClientLite Backing off for 8879.794091495483ms

Additional context
I don't know how to initialize encryption properly and I couldn't find it in the docs. Should it just work or I should do something more? It created some files in that directory though.

[AndrewFerr]

This should have been fixed by #283

[urmaul]

Great! Could you please make a new release with this update?

[turt2live]

Great! Could you please make a new release with this update?

A release is planned for the near future, once a couple other encryption issues are fixed.

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@AndrewFerr I'd appreciate forks not be advertised here.