Dazl

What's Changed
* Pin Protobuf version to 3.x.x to avoid breaking changes introduced by 4.x.x. This leads to some DARs not being parseable by dazl. by alexgraham-da in https://github.com/digital-asset/dazl-client/pull/346


**Full Changelog**: https://github.com/digital-asset/dazl-client/compare/v7.8.0...v7.8.1

What's Changed
* Upgrade Protobuf, and regenerate code for compatibility with newer versions of Protobuf. by da-tanabe in https://github.com/digital-asset/dazl-client/pull/344
* dazl now requires at least version 3.19 of the Protobuf libraries; this is for compatibility with version 4.20.1, which has recently been released.


**Full Changelog**: https://github.com/digital-asset/dazl-client/compare/v7.7.6...v7.8.0

What's Changed
* python: Miscellaneous fixes to improve compatibility with Daml 2 ledgers running behind auth. by da-tanabe in https://github.com/digital-asset/dazl-client/pull/343


**Full Changelog**: https://github.com/digital-asset/dazl-client/compare/v7.7.5...v7.7.6

What's Changed
* python: Improve token version detection logic. by da-tanabe in https://github.com/digital-asset/dazl-client/pull/342


**Full Changelog**: https://github.com/digital-asset/dazl-client/compare/v7.7.4...v7.7.5

What's Changed
* python: Remove some extraneous debugging statements. by da-tanabe in https://github.com/digital-asset/dazl-client/pull/341


**Full Changelog**: https://github.com/digital-asset/dazl-client/compare/v7.7.3...v7.7.4

What's Changed
* python: Add support for VersionService. by da-tanabe in https://github.com/digital-asset/dazl-client/pull/338
* python: Fix errors in processing Daml V1 tokens when submitting commands. by da-tanabe in https://github.com/digital-asset/dazl-client/pull/340


**Full Changelog**: https://github.com/digital-asset/dazl-client/compare/v7.7.2...v7.7.3