Bump waitress from 1.3.1 to 1.4.3

Bumps waitress from 1.3.1 to 1.4.3.

Changelog

1.4.3 (2020-02-02)

Security Fixes
- In Waitress version 1.4.2 a new regular expression was added to validate the
  headers that Waitress receives to make sure that it matches RFC7230.
  Unfortunately the regular expression was written in a way that with invalid
  input it leads to catastrophic backtracking which allows for a Denial of
  Service and CPU usage going to a 100%.
This was reported by Fil Zembowicz to the Pylons Project. Please see
https://github.com/Pylons/waitress/security/advisories/GHSA-73m2-3pwg-5fgc
for more information.
1.4.2 (2020-01-02)
Security Fixes
This is a follow-up to the fix introduced in 1.4.1 to tighten up the way Waitress strips whitespace from header values. This makes sure Waitress won't accidentally treat non-printable characters as whitespace and lead to a potental HTTP request smuggling/splitting security issue.

Thanks to ZeddYu Lu for the extra test cases.

Please see the security advisory for more information: https://github.com/Pylons/waitress/security/advisories/GHSA-m5ff-3wj3-8ph4

CVE-ID: CVE-2019-16789

Bugfixes
- Updated the regex used to validate header-field content to match the errata
  that was published for RFC7230.
See: https://www.rfc-editor.org/errata_search.php?rfc=7230&amp;eid=4189
1.4.1 (2019-12-24)
Security Fixes
Waitress did not properly validate that the HTTP headers it received were

... (truncated)

Commits

cbc89bf Prep v1.4.3
6e46f9e Merge pull request from GHSA-73m2-3pwg-5fgc
51b9bd4 Remove accidental backslash
f87abb7 Add bad header that caused catastrophic backtracking
2fe8e54 Add header parsing tests with short headers
ac0ca05 Remove catastrophic backtracking in regex
8af9adb Prep for 1.4.2
634d991 Merge pull request #277 from Pylons/invalid-whitespace-cont
3a54e29 Add CHANGES and bump version to 1.4.2
0bf98da Update RFC7230 regex with errata for header field-content
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giovanni-angeli / flask_tracker

Bump waitress from 1.3.1 to 1.4.3 #6

1.4.3 (2020-02-02)

1.4.2 (2020-01-02)

1.4.1 (2019-12-24)