Revert "Remove chardet version upper limit" to bring back upper limit <= 5.0.0 on chardet

[yarikoptic]

This reverts commit 0f27cd5.

Original change sounded kosher and "we agreed" with reasoning but original PR #7029 for some reason did not have Travis CI runs and now after it was merged we keep getting tests failed when submitting PRs against maint with failures like

____________________________ test_run_datalad_help _____________________________
[gw0] linux -- Python 3.8.6 /tmp/dl-miniconda-jm48jjoo/bin/python

	@assert_cwd_unchanged
	def test_run_datalad_help():
		out, err = check_run_and_get_output("datalad --help")
		ok_startswith(out, "Usage: ")
		# There could be a warning from coverage that no data was collected, should be benign
		lines = [l for l in err.split(os.linesep) if ('no-data-collected' not in l) and l]
>       eq_(lines, [])

../datalad/tests/test_installed.py:47:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

first = ["/tmp/dl-miniconda-jm48jjoo/lib/python3.8/site-packages/requests/__init__.py:102: RequestsDependencyWarning: urllib3 ...ported version!", '  warnings.warn("urllib3 ({}) or chardet ({})/charset_normalizer ({}) doesn\'t match a supported "']
second = [], msg = None

	def assert_equal(first, second, msg=None):
		if msg is None:
>           assert first == second
E           assert ['/tmp/dl-min... supported "'] == []
E             Left contains 2 more items, first extra item: "/tmp/dl-miniconda-jm48jjoo/lib/python3.8/site-packages/requests/__init__.py:102: RequestsDependencyWarning: urllib3 (1.26.8) or chardet (5.0.0)/charset_normalizer (2.0.4) doesn't match a supported v
ersion!"
E             Full diff:
E               [
E             -  ,
E             +  '/tmp/dl-miniconda-jm48jjoo/lib/python3.8/site-packages/requests/__init__.py:102: '
E             +  'RequestsDependencyWarning: urllib3 (1.26.8) or chardet '
E             +  "(5.0.0)/charset_normalizer (2.0.4) doesn't match a supported version!",
E             +  '  warnings.warn("urllib3 ({}) or chardet ({})/charset_normalizer ({}) '
E             +  'doesn\'t match a supported "',
E               ]

../datalad/tests/utils_pytest.py:107: AssertionError

@kimsin98 feel welcome to reincarnate #7029 but we should make sure it doesn't break testing again -- there must be more to the story.

[codecov]

Codecov Report

Base: 75.05% // Head: 76.17% // Increases project coverage by +1.12% 🎉

Coverage data is based on head (52ab90f) compared to base (5128733).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##            maint    #7057      +/-   ##
==========================================
+ Coverage   75.05%   76.17%   +1.12%     
==========================================
  Files         354      354              
  Lines       58927    58940      +13     
  Branches     6615     6615              
==========================================
+ Hits        44226    44896     +670     
+ Misses      14687    14030     -657     
  Partials       14       14              

Impacted Files	Coverage Δ
datalad/customremotes/tests/test_datalad.py	87.23% <0.00%> (-1.90%)	⬇️
datalad/_version.py	45.68% <0.00%> (-0.28%)	⬇️
datalad/distribution/create_sibling.py	60.48% <0.00%> (-0.15%)	⬇️
datalad/cli/common_args.py	100.00% <0.00%> (ø)
datalad/tests/test_dochelpers.py	100.00% <0.00%> (ø)
datalad/support/annexrepo.py	75.55% <0.00%> (+0.05%)	⬆️
datalad/support/gitrepo.py	84.25% <0.00%> (+0.05%)	⬆️
datalad/support/tests/test_network.py	69.09% <0.00%> (+0.07%)	⬆️
datalad/customremotes/tests/test_archives.py	89.36% <0.00%> (+0.07%)	⬆️
datalad/tests/test_utils.py	70.28% <0.00%> (+0.09%)	⬆️
... and 43 more

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[yarikoptic]

if no objections, I would merge this asap (ie tomorrow) to bring CI back to sane state.

[yarikoptic]

As promised -- merging

[kimsin98]

For some reason, pip install requests 2.27.1 in Travis CI while the chardet version bump is in 2.28.1. Until someone can fix the discrepancy or version in Travis CI catches up, I agree we should put #7029 on hold.

[yarikoptic-gitmate]

PR released in 0.17.7