Bump sqlparse from 0.3.0 to 0.4.4 in /examples/python-postgres

Bumps [sqlparse](https://github.com/andialbrecht/sqlparse) from 0.3.0 to 0.4.4.
- [Release notes](https://github.com/andialbrecht/sqlparse/releases)
- [Changelog](https://github.com/andialbrecht/sqlparse/blob/master/CHANGELOG)
- [Commits](https://github.com/andialbrecht/sqlparse/compare/0.3.0...0.4.4)

---
updated-dependencies:
- dependency-name: sqlparse
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

examples/python-postgres/requirements.txt

@@ -1,4 +1,4 @@
 Django>=2.2.9
 pytz==2019.1
-sqlparse==0.3.0
+sqlparse==0.4.4
 psycopg2-binary==2.8.3