Update dependencies (particularly crc 3.0.0)

[chyyran]

Pull Request Overview

This pull request adds/changes/fixes...

• Updates byteorder to 1.4.3
• Updates log to 0.4.17
• Updates env_logger to 0.9.0
• Updates crc to 3.0.0
  • crc from ^1.0.0 -> 3.0.0 represents a very large API change. In particular, algorithms are now const-initialized and Digest no longer implements Hash, so Write/Read for DigestWrite/Read (formerly HasherWrite/Read) has to be implemented per type. This results in most of the code changes in this PR.
  • The particular selection of CRC polynomials are consistent with the old version of crc and the XZ specification. See CRC-64/XZ and and CRC-32/ISO-HDLC in the catalogue of parameterised CRC algorithms.

Testing Strategy

This pull request was tested by ...

• [x] The existing tests are sufficient and should all pass

[chyyran]

Addressed the nits and rebased on master. See follow up comment on reasoning for CrcDigestRead/Write.

[gendx]

In the meantime I've merged #82 which addresses the import formatting question.

Could you rebase on top of it to resolve the merge conflict?

[chyyran]

Rebased on master in 698620b