Merge pull request blue-yonder#319 from ldacey/master

Merge pull request blue-yonder#309 from blue-yonder/changelog-4.2.0

Preprare 4.2.0 release

Merge pull request blue-yonder#295 from bjoernmeier/fix-pypi-upload

remove faulty env var check in pypi upload step

Bump version

Update CHANGELOG.rst

Deploy on Python 3.6

Merge pull request blue-yonder#249 from keitherskine/add-boost-refere…

…nce-in-docs-for-Windows

Add reference to Boost compilation for Windows in docs

Merge pull request blue-yonder#252 from blue-yonder/arrow-0.17-fixes

Fixes for Arrow 0.17; add Arrow nightlies job

Release 3.3.0

Remove bdist_wheel distribution