Update sqlparse to 0.4.2

[pyup-bot]

This PR updates sqlparse from 0.4.1 to 0.4.2.

Changelog

0.4.2

----------------------------

Notable Changes

* IMPORTANT: This release fixes a security vulnerability in the
strip comments filter. In this filter a regular expression that was
vulnerable to ReDOS (Regular Expression Denial of Service) was
used. See the security advisory for details: https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-p5w8-wqhj-9hhf
The vulnerability was discovered by erik-krogh and yoff from
GitHub Security Lab (GHSL). Thanks for reporting!

Enhancements

* Add ELSIF as keyword (issue584).
* Add CONFLICT and ON_ERROR_STOP keywords (pr595, by j-martin).

Bug Fixes

* Fix parsing of backticks (issue588).
* Fix parsing of scientific number (issue399).

Links

• PyPI: https://pypi.org/project/sqlparse
• Changelog: https://pyup.io/changelogs/sqlparse/
• Repo: https://github.com/andialbrecht/sqlparse

[codecov]

Codecov Report

Merging #140 (f479a26) into master (8bb1566) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #140   +/-   ##
=======================================
  Coverage   78.42%   78.42%           
=======================================
  Files          26       26           
  Lines         533      533           
=======================================
  Hits          418      418           
  Misses        115      115           

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