Bump rust crypto sdk version 0.4.1

[BillCarsonFr]

Updates crypto sdk version to 0.4.1

Some breaking changes:

• some key data can directly be passed as Data instead of UInt8 array.
• Other changes on pickle format.
• bootstrapCrossSigning now returning an optional device key upload

Updated the minimum ios version to 13, was previously 11.0 (to match the new pod min)
Updated the minimum osx version to 10.15, was previously 10.10

Pull Request Checklist

• Pull request is based on the develop branch
• Pull request contains a changelog file in ./changelog.d. See https://github.com/matrix-org/matrix-ios-sdk/blob/develop/CONTRIBUTING.md#changelog
• Pull request includes a sign off

[stefanceriu]

Looks good to me but the tests aren't happy

[stefanceriu]

🐑 it!