Tweak coveralls configuration
Tweak coveralls configuration

coveralls.io is throwing 422 and breaking CI,
this may or may not help.

Related: https://github.com/TheKevJames/coveralls-python/issues/252

iphoting/healthchecks,iphoting/healthchecks,healthchecks/healthchecks,healthchecks/healthchecks,iphoting/healthchecks,healthchecks/healthchecks,healthchecks/healthchecks,iphoting/healthchecks