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Fix OSX conda env for ICD-based Conda CL

See merge request !148

Don't use specific Python 3 sub-versions in CI

See merge request !147

Add Pytest/JUnit/Gitlab integration

See merge request !136

# Conflicts:
#   .gitlab-ci.yml

Drop Py3.5 CI, add 3.7 CI

See merge request !143

QBXExpansionWrangler: Fix early-exit return values to conform to timing interface

See merge request !140

When there are no used QBX centers, the Sumpy wrangler returns early,
but it wasn't returning a TimingResult as it should have

Flake8 3.6.0 fixes (closes #114)

Closes #114

See merge request !138