Bump sphinxcontrib-serializinghtml from 1.1.3 to 1.1.4 (from PR #1105)
Bump sphinxcontrib-serializinghtml from 1.1.3 to 1.1.4 (from PR #1105)

Bumps [sphinxcontrib-serializinghtml](http://sphinx-doc.org/) from 1.1.3 to 1.1.4.

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>

mozilla/ichnaea,mozilla/ichnaea,mozilla/ichnaea,mozilla/ichnaea