Release-v2.2.1

This is an optional release, it fixed an important bug. When an incomplete CAR file is downloaded, the download process will not retry, and the deal will be importedFailed

If you have met this issue, please upgrade to v2.2.1.

How to Upgrade

• replace the latest swan-provider binary

Bug Fixes：

• fix: import failed with the incomplete CAR file(filswan/go-swan-provider#227).