Bump plpygis from 0.2.0 to 0.2.1

Bumps [plpygis](https://github.com/bosth/plpygis) from 0.2.0 to 0.2.1.
- [Release notes](https://github.com/bosth/plpygis/releases)
- [Changelog](https://github.com/bosth/plpygis/blob/master/CHANGELOG.md)
- [Commits](bosth/plpygis@v0.2.0...v0.2.1)

---
updated-dependencies:
- dependency-name: plpygis
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

setup.py

@@ -22,7 +22,7 @@
           'pipelinewise-singer-python==1.*',
           'PyMySQL==1.0.2',
           'mysql-replication==0.30',
-          'plpygis==0.2.0',
+          'plpygis==0.2.1',
           'tzlocal==2.1',
       ],
       extras_require={