static: update to newer black

[sergiusens]

• Have you followed the guidelines for contributing?
• Have you signed the CLA?
• Have you successfully run ./runtests.sh static?
• Have you successfully run ./runtests.sh tests/unit?

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[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@a646def). Click here to learn what that means.
The diff coverage is 85.71%.

@@            Coverage Diff            @@
##             master    #2599   +/-   ##
=========================================
  Coverage          ?   89.07%           
=========================================
  Files             ?      206           
  Lines             ?    14045           
  Branches          ?     2123           
=========================================
  Hits              ?    12511           
  Misses            ?     1082           
  Partials          ?      452

Impacted Files	Coverage Δ
snapcraft/cli/ci.py	86.66% <ø> (ø)
snapcraft/plugins/cmake.py	87.69% <0%> (ø)
snapcraft/internal/lifecycle/_packer.py	73.01% <100%> (ø)
snapcraft/storeapi/_sca_client.py	86.81% <100%> (ø)
snapcraft/internal/deltas/_deltas.py	94.54% <100%> (ø)
snapcraft/storeapi/errors.py	85.67% <100%> (ø)

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[sparkiegeek]

LGTM, +1