* tests: add space in constraints file
* fix: use uri strings in PIP_CONSTRAINTS
* WIP: try using quotes instead of uri
* Update cibuildwheel/windows.py
* Revert "Update cibuildwheel/windows.py"
This reverts commit 0951425524166677fdfd8df7e6bbbc9782ea2fb0.
* Revert "WIP: try using quotes instead of uri"
This reverts commit 5790eda4c6f231d5958f4cbd720683f787eea042.
* fix: work around pip bug with URI handling
* WIP: try biger hack
* fix: try using temporary file
* refactor: use common prefix for install dir on Windows
* Use more flexible type PathOrStr to simplify
* Rename variables to make slightly clearer
Co-authored-by: Joe Rickerby <joerick@mac.com>