Update tox requirement from <3.18,>=3.17 to >=3.17,<3.19

[dependabot-preview[bot]]

Updates the requirements on tox to permit the latest version.

Changelog

Sourced from tox's changelog.

v3.18.0 (2020-07-23)

Deprecations (removal in next major release)

• Add allowlist_externals alias to whitelist_externals (whitelist_externals is now deprecated). - by dajose #1491

v3.17.1 (2020-07-15)

Bugfixes

• Fix tests when the HOSTNAME environment variable is set, but empty string - by hroncok #1616

v3.17.0 (2020-07-14)

Features

• The long arguments --verbose and --quiet (rather than only their short forms, -v and -q) are now accepted. #1612
• The ResultLog now prefers HOSTNAME environment variable value (if set) over the full qualified domain name of localhost. This makes it possible to disable an undesired DNS lookup, which happened on all tox invocations, including trivial ones - by hroncok #1615

Documentation

• Update packaging information for Flit. #1613

v3.16.1 (2020-06-29)

Bugfixes

• Fixed the support for using {temp_dir} in tox.ini - by webknjaz #1609

v3.16.0 (2020-06-26)

Features

• Allow skipping the package and installation step when passing the --skip-pkg-install. This should be used in pair with the --notest, so you can separate environment setup and test run:

  tox -e py --notest
  tox -e py --skip-pkg-install
  

Commits

• 513cdc8 release 3.18.0
• a9ec661 Add alias "allowlist_externals" to "whitelist_externals" (#1601)
• c4ef11d Add setup.cfg formatting
• f3a063a Fix tty substitution to displays as code block (#1622)
• 3c10fd9 Specify the default value of parallel mode (#1620)
• 3de864a Merge pull request #1619 from tox-dev/release-3.17.1
• 681a094 release 3.17.1
• 7a65627 Fix tests when HOSTNAME is set, but empty string (#1618)
• 03bc093 Merge pull request #1617 from tox-dev/release-3.17.0
• See full diff in compare view

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[codecov[bot]]

Codecov Report

Merging #101 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #101   +/-   ##
=======================================
  Coverage   64.98%   64.98%           
=======================================
  Files          28       28           
  Lines        1411     1411           
=======================================
  Hits          917      917           
  Misses        494      494           

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