py-wheel: updated to 0.34.1

0.34.1:
- Fixed installation of ``wheel`` from sdist which was broken due to a chicken
  and egg problem with PEP 517 and setuptools_scm

0.34.0:
- Dropped Python 3.4 support
- Added automatic platform tag detection for macOS binary wheels
- Added the ``--compression=`` option to the ``bdist_wheel`` command
- Fixed PyPy tag generation to work with the updated semantics
- Updated project packaging and testing configuration for :pep:`517`
- Moved the contents of setup.py to setup.cfg
- Fixed duplicate RECORD file when using ``wheel pack`` on Windows
- Fixed bdist_wheel failing at cleanup on Windows with a read-only source tree
- Fixed ``wheel pack`` not respecting the existing build tag in ``WHEEL``
- Switched the project to use the "src" layout
- Switched to setuptools_scm_ for versioning

(adam)