RELEASE CHECKOUT

- bump version in VERSION
- update doc/history.rst
- python setup.py build
  (this makes _version.py and SWIGs _HTSeq.c)
- git add ...
- git commit ...
- git push

(wait for CI/doc build to complete)

If all well:

- check documentation on readthedocs

If all well:

- git tag release_<semantic-version>_RC1
- git push origin release_<semantic-version>_RC1 (deploys to testpypi)

(wait for CD to complete)

If all well:
- check on testpypi that all files are there:
 - source
 - manylinux binaries
 - mac binaries

If all well:
- git tag release_<semantic-version>
- git push origin release_<semantic-version> (pypi deploy trigger)
