Performance optimisation and DLT 2.18.8 support

Code in the new dltlyse release has seen a significant performance boost for a rewrite of the hot path that improves parsing speed of multi-Gb DLT files multiple times. Build and test system has been brought up to latest Python practises. A lot more unit tests have been added. Additionally support for newest python-dlt version is added.

What's Changed

• Update the open source version by @yen3 in #2
• dltlyse: Update message payload pattern after python-dlt bb8f5b8 by @yen3 in #3

New Contributors

• @yen3 made their first contribution in #2

Full Changelog: v1.2...v1.4