For CI, we used to have Windows builds through AppVeyor, but they haven't worked for a while (#279). Since CircleCI also provides Windows builds, let's just switch to CircleCI.
Resolves #279.
[x] (For Civis employees only) Reference to a relevant ticket in the pull request title
[x] Changelog entry added to CHANGELOG.md at the repo's root level
[x] Description of change in the pull request description
[x] If applicable, unit tests have been added and/or updated
For CI, we used to have Windows builds through AppVeyor, but they haven't worked for a while (#279). Since CircleCI also provides Windows builds, let's just switch to CircleCI.
Resolves #279.
CHANGELOG.mdat the repo's root level