Version 0.1.0a4

[yxqd]

Version 0.1.0 alpha 4

Updated for mcvine/mcvine#269

Changes to release

• [x] Update version in CMakeLists.txt
• [x] Update git tag and push: git tag -a vX.X.X -m 'comment'
• [x] In conda recipes, update meta.yaml and build