Bump sqlparse from 0.5.3 to 0.5.4 (#330)

Bumps [sqlparse](https://github.com/andialbrecht/sqlparse) from 0.5.3 to 0.5.4.
- [Changelog](https://github.com/andialbrecht/sqlparse/blob/master/CHANGELOG)
- [Commits](andialbrecht/sqlparse@0.5.3...0.5.4)

---
updated-dependencies:
- dependency-name: sqlparse
  dependency-version: 0.5.4
  dependency-type: indirect
...

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Author: dependabot[bot]

requirements.txt

@@ -163,7 +163,7 @@ six==1.17.0
     # via
     #   python-dateutil
     #   stix2-patterns
-sqlparse==0.5.3
+sqlparse==0.5.4
     # via django
 stix2==3.0.1
     # via