chore(deps): update qrcode requirement from ~=5.3 to ~=6.1

[dependabot-preview]

Updates the requirements on qrcode to permit the latest version.

Changelog

Sourced from qrcode's changelog.

6.1 (14 January 2019)

• Fix short chunks of data not being optimized to the correct mode.
• Tests fixed for Python 3

6.0 (23 March 2018)

• Fix optimize length being ignored in QRCode.add_data.
• Better calculation of the best mask pattern and related optimizations. Big thanks to cryptogun!

5.3 (18 May 2016)

• Fix incomplete block table for QR version 15. Thanks Rodrigo Queiro for the report and Jacob Welsh for the investigation and fix.
• Avoid unnecessary dependency for non MS platforms, thanks to Noah Vesely.
• Make BaseImage.get_image() actually work.

5.2 (25 Jan 2016)

• Add --error-correction option to qr script.
• Fix script piping to stdout in Python 3 and reading non-UTF-8 characters in Python 3.
• Fix script piping in Windows.
• Add some useful behind-the-curtain methods for tinkerers.
• Fix terminal output when using Python 2.6
• Fix terminal output to display correctly on MS command line.

5.2.1

• Small fix to terminal output in Python 3 (and fix tests)

5.2.2

• Revert some terminal changes from 5.2 that broke Python 3's real life tty code generation and introduce a better way from Jacob Welsh.

5.1 (22 Oct 2014)

• Make qr script work in Windows. Thanks Ionel Cristian Mărieș
• Fixed print_ascii function in Python 3.
• Out-of-bounds code version numbers are handled more consistently with a ValueError.
• Much better test coverage (now only officially supporting Python 2.6+)

5.0 (17 Jun 2014)

... (truncated)

Commits

• d213e02 Preparing release 6.1
• 8955ab0 Update changes
• c6cf4ce Fix short chunks of data not being encoded to the correct mode
• 3505606 Fix tests in python 3
• 7931b9d Fix metadata keywords
• 574651d Back to development: 6.1
• 9a4a0e0 Preparing release 6.0
• a6d3a73 Merge branch 'cryptogun-master'
• 51ed9da Note changes from cryptogun
• 4c8114b Merge branch 'master' of https://github.com/cryptogun/python-qrcode into cryp...
• Additional commits viewable in compare view

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