Bump pymongo from 3.9.0 to 3.10.0

Bumps [pymongo](https://github.com/mongodb/mongo-python-driver) from 3.9.0 to 3.10.0.
- [Release notes](https://github.com/mongodb/mongo-python-driver/releases)
- [Changelog](https://github.com/mongodb/mongo-python-driver/blob/master/doc/changelog.rst)
- [Commits](mongodb/mongo-python-driver@3.9.0...3.10.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

requirements.txt

@@ -1,5 +1,5 @@
 ruamel.yaml==0.16.5
-pymongo==3.9.0
+pymongo==3.10.0
 Jinja2==2.10.3
 six==1.13.0
 monty==3.0.2