Update h5py requirement from >=2.7 to >=3.16.0

Updates the requirements on [h5py](https://github.com/h5py/h5py) to permit the latest version.
- [Release notes](https://github.com/h5py/h5py/releases)
- [Changelog](https://github.com/h5py/h5py/blob/master/docs/release_guide.rst)
- [Commits](h5py/h5py@2.7.0...3.16.0)

---
updated-dependencies:
- dependency-name: h5py
  dependency-version: 3.16.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,6 +1,6 @@
 numpy>=1.13.3
 matplotlib>=2.0.0
-h5py>=2.7
+h5py>=3.16.0
 scipy>=0.16
 numba