Bump biopython from 1.76 to 1.77 in /python/requirements/CI

Bumps [biopython](https://github.com/biopython/biopython) from 1.76 to 1.77.
- [Release notes](https://github.com/biopython/biopython/releases)
- [Changelog](https://github.com/biopython/biopython/blob/master/NEWS.rst)
- [Commits](https://github.com/biopython/biopython/commits)

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

Author: dependabot-preview[bot]

python/requirements/CI/requirements.txt

@@ -1,5 +1,5 @@
 attrs==19.3.0
-biopython==1.76
+biopython==1.77
 black==19.10b0
 breathe==4.14.2
 codecov==2.1.3