Tippecanoe

* Avoid crashing if there is a polygon ring with only one point

* Fix bugs in --no-simplification-of-shared-nodes
* Updated dockerfile (jtmiclat)
* Set build options to use C++-17 (james2432)
* Use std::fpclassify instead of plain fpclassify (james)
* Fix pmtiles warnings (bdon)

* Add `--include`/`-y` option to tile-join

* Add --cluster-maxzoom option to limit zoom levels that receive clustering
* Add `point_count_abbreviated` attribute to clustered features, for consistency with supercluster
* Makefile changes to support FreeBSD
* Add -r option to tile-join to provide a file containing a list of input files
* Add antimeridian_adjusted_bounds field to tileset metadata

* Remove the concept of "separate metadata." Features now always directly reference their keys and values rather than going through a second level of indirection.
* Limit the size of the string pool to 1/5 the size of memory, to prevent thrashing during feature ingestion.
* Avoid using writeable memory maps. Instead, explicitly copy data in and out of memory.
* Compress streams of features in the temporary files, to reduce disk usage and I/O latency

* Speed up feature dropping by removing unnecessary search for other small features