termcolor now disables colour if not tty, but FORCE_COLOR for colour tests

[hugovk]

Since https://github.com/termcolor/termcolor/releases/tag/2.1.0 and https://github.com/termcolor/termcolor/pull/25, we need to make sure colour is enabled for these tests.

Fixes failures seen in https://github.com/hugovk/norwegianblue/pull/103, https://github.com/hugovk/norwegianblue/pull/104, https://github.com/hugovk/norwegianblue/pull/105, https://github.com/hugovk/norwegianblue/pull/106.

[codecov[bot]]

Codecov Report

Merging #107 (90f9d95) into main (45159d6) will increase coverage by 0.01%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #107      +/-   ##
==========================================
+ Coverage   95.28%   95.30%   +0.01%     
==========================================
  Files           9        9              
  Lines         382      383       +1     
==========================================
+ Hits          364      365       +1     
  Misses         18       18              

Flag	Coverage Δ
macos-latest	94.77% <100.00%> (-0.51%)	:arrow_down:
ubuntu-latest	95.30% <100.00%> (+0.01%)	:arrow_up:
windows-latest	95.30% <100.00%> (+0.01%)	:arrow_up:

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Impacted Files	Coverage Δ
tests/test_norwegianblue.py	100.00% <100.00%> (ø)

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