Updates the requirements on python-barcode to permit the latest version.

Sourced from python-barcode's changelog.

v0.16.1

* Switch from ``setup.py`` to ``pyproject.toml``. Only affects how installation
  from source is performed, and has no runtime impact.
v0.16.0

• Breaking Drop support for Python 3.7 and 3.8.
• Make image DPI configurable.
• Fixed inconsistent checksum calculation when calculating the checksum multiple times for EAN barcodes.
• Update the documentation with some barcodes that were not previously documented.
• Specifying None as a background for the SVGWriter, no background is included resulting in a transparent background.
• Do not paint text if its size would be zero, to avoid an "invalid ppem value" error with newer versions of Pillow.
• Optimization of code creation, avoiding to many charset switch. This results in shorter codes; according to GS1 codes should not be longer than 165 mm (6.5"). (#232)

v0.15.1

* Add missing dependency to release script.
v0.15.0

• Breaking Dropped support for Python 3.6 and 3.7.
• Added support for Python 3.11.
• Fixed compatibility with Pillow 10.0.
• Updated ISBN to support newer allocated ranges.
• Improved type hints.

v0.14.0

* **Breaking**: The default dimensions have changed slightly. This is so that
  the results of generating a PNG and an SVG look more alike.
* Previous versions included an empty text element for SVGs with no comment.
  This is no longer the case.
* Some internals have been improved so as to allow better subclassing.
  Subclasses of ``Barcode`` can now override ``default_writer_options`` and
  ``default_writer()``.
* A ``guardbar`` parameter has been added to EAN barcodes. This renders
  barcodes with guardars (longer bars).
* Added support for Python 3.10.
* The documentation setup has been redone, hopefully squashing a lot of legacy
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• cf58852 Switch from setup.py to pyproject.toml
• See full diff in compare view