Update dependency sqlparse to v0.4.2

[mend-for-github-com]

This PR contains the following updates:

Package	Update	Change
sqlparse (changelog)	patch	==0.4.1 → ==0.4.2

By merging this PR, the issue #6 will be automatically resolved and closed:

Severity	CVSS Score	Vulnerability
High	7.5	WS-2021-0369

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Release Notes

andialbrecht/sqlparse (sqlparse)

v0.4.2

Compare Source

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: 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).

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