build(deps-dev): Bump coverage from 4.5.3 to 4.5.4

[dependabot-preview[bot]]

Bumps coverage from 4.5.3 to 4.5.4.

Changelog

*Sourced from [coverage's changelog](https://github.com/nedbat/coveragepy/blob/master/CHANGES.rst).* > Version 4.5.4 -- 2019-07-29 > =========================== > > - Multiprocessing support in Python 3.8 was broken, but is now fixed. Closes [issue 828](https://github-redirect.dependabot.com/nedbat/coveragepy/issues/828).

Commits

- [`4e624d1`](https://github.com/nedbat/coveragepy/commit/4e624d142a1e16acf32f90bf9b996fad80958740) Use latest twine - [`e537d7d`](https://github.com/nedbat/coveragepy/commit/e537d7d70eb4d4f81b94b7160ee24db21c701d6e) Build wheels for 3.8 - [`c619ec8`](https://github.com/nedbat/coveragepy/commit/c619ec807544ec1f7af555c959d9855654b79195) Prep for 4.5.4 - [`b003fe1`](https://github.com/nedbat/coveragepy/commit/b003fe1b52088795c4748fb13ff68fc5c7734357) Pin pyparsing to avoid warnings - [`60c6c98`](https://github.com/nedbat/coveragepy/commit/60c6c98a1aa0de65b702fc95cf47eca022aee46c) Tidelift security contact, and non-transparent logo. - [`c9ee224`](https://github.com/nedbat/coveragepy/commit/c9ee22417b4aa3611c8332f151d6cce40efad39b) 4.5.x works on 3.8.0b1 - [`8c371b2`](https://github.com/nedbat/coveragepy/commit/8c371b2f14bc45e3be156d9d427a500e5535578a) Adapt to optimization tweak in CPython 3.8.0b1 - [`ca0bba4`](https://github.com/nedbat/coveragepy/commit/ca0bba4d8d9aaf22dee83268325e20cddb532edf) Silence a silly pylint warning - [`72b21f1`](https://github.com/nedbat/coveragepy/commit/72b21f1f1180ad52da646b1c47d8d2dc7f95c189) Python 3.8 added an argument to _bootstrap. It should have been like this any... - [`9dda46a`](https://github.com/nedbat/coveragepy/commit/9dda46a4353a5fe53c4b213083fb777e0e519e6c) Not sure how I went for so long without one of these creeping in - Additional commits viewable in [compare view](https://github.com/nedbat/coveragepy/compare/coverage-4.5.3...coverage-4.5.4)

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[dependabot-preview[bot]]

Superseded by #93.