v0.8.0-pre.1

Bug fixes, performance improvements, dependency upgrades, plus:

• Add --layer-stats option to output a layer stats tsv
• Make output deterministic for the same input
• Upgrade to openmaptiles 3.15 (including ~50% tile size reduction from layer stats debugging)
• Add support for geoparquet (ie. overture) sources and structured feature attributes
• Improve support for writing a java profile against planetiler.jar without any build tools (will add an example repo)
• profile API improvements: omit(), whole tile post-process hook, partial-line attributes (used by overture)

Putting out a pre-release to test no-build-tool java profiles against attached planetiler.jar