Log message:
python/wheel.mk: simplify a lot, and switch to 'installer' for installation

This follows the recommended bootstrap method (flit_core, build, installer).

However, installer installs different files than pip, so update PLISTs
for all packages using wheel.mk and bump their PKGREVISIONs.

Log message:
py-fasteners: updated to 0.19

0.19
- Add `.acquire_read_lock`, `.release_read_lock`, `.acquire_write_lock`, and
  `.release_write_lock` methods to the inter thread `ReaderWriterLock` as was
  promised in the README.
- Remove support for python 3.7 and pypy 3.7. It should still work, but is no
  longer tested.
- Add support for pypy 3.10 and python 3.11

Log message:
Mass-change BUILD_DEPENDS to TOOL_DEPENDS outside mk/.

Almost all uses, if not all of them, are wrong, according to the
semantics of BUILD_DEPENDS (packages built for target available for
use _by_ tools at build-time) and TOOL_DEPEPNDS (packages built for
host available for use _as_ tools at build-time).

No change to BUILD_DEPENDS as used correctly inside buildlink3.

As proposed on tech-pkg:
https://mail-index.netbsd.org/tech-pkg/2023/06/03/msg027632.html

Log message:
py-fasteners: updated to 0.18

0.18
- Reshuffle the process lock code and properly document it.
- Revamp the docs and switch from sphinx to mkdocs
- Remove difficult to use tread lock features from docs
- Bring back support for eventlet `spawn_n`
- Remove support for python3.6. It should still work, but is no longer tested.

Log message:
py-fasteners: convert to wheel.mk

Log message:
py-fasteners: updated to 0.17.3

0.17.3:
  - Allow writer to become a reader in thread ReaderWriter lock

0.17.2:
  - Remove unnecessary setuptools pin

0.17.1:
  - Switch to the modern python package build infrastructure

0.17: [NEVER RELEASED]
  - Remove support for python 3.5 and earlier, including 2.7
  - Add support for python 3.9 and 3.10
  - Fix a conflict with django lock
  - Add __version__ and __all__ attributes
  - Fix a failure to parse README as utf-8
  - Move from nosetest to pytest and cleanup testing infrastructure

Log message:
*: switch py-testtools users to versioned_dependencies.mk

Log message:
*: bump PKGREVISION for egg.mk users

They now have a tool dependency on py-setuptools instead of a DEPENDS