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:
*: switch python2 packages to use py27-attrs

Log message:
py-test4: stop using py-argcomplete

Log message:
py-test4: updated to 4.6.11

pytest 4.6.11 (2020-06-04)
==========================

Bug Fixes
---------

- Fix summary entries appearing twice when ``f/F`` and ``s/S`` report chars were \ 
used at the same time in the ``-r`` command-line option (for example ``-rFf``).

  The upper case variants were never documented and the preferred form should be \ 
the lower case.

- Fix ``UnboundLocalError: local variable 'letter' referenced before
  assignment`` in ``_pytest.terminal.pytest_report_teststatus()``
  when plugins return report objects in an unconventional state.

  This was making ``pytest_report_teststatus()`` skip
  entering if-block branches that declare the ``letter`` variable.

  The fix was to set the initial value of the ``letter`` before
  the if-block cascade so that it always has a value.

Log message:
py-test4: py-setuptools_scm is build, not test, dependency

Log message:
py-test4: comment out py-requests test dependency

py-requests will soon not support python 2.x

Log message:
py-test4: limit to python 2.7 and mention python 2.7 in DESCR

Log message:
*: use versioned_dependencies.mk for py-importlib-metadata

Log message:
*: setuptools_scm: switch to versioned_dependencies

Log message:
*: set USE_PKG_RESOURCES for more packages