Alfred-pyworkflow

- Add `util.set_theme()`
- Add `util.action_in_alfred()`
- Add `util.browse_in_alfred()`
- Add `util.search_in_alfred()`
- Add `util.reload_workflow()`

- Add `web.delete()`
- Add `web.put()`
- Allow arbitrary HTTP method in `web.request()`
- Pretty-print JSON when Alfred's debugger is open

Ensure environment variables are encoded in unit tests.

Update and External Trigger APIs now know about Alfred 4.

- Add support for `.alfred4workflow` file extension to hide workflows from Alfred 3 and below.
- Replace AppleScript with JXA.
- Automatically call `Alfred 3` or `com.runningwithcrayons.Alfred` depending on the version of Alfred the library is running in.

- Make `util.appinfo()` not choke if multiple apps with the same bundle ID are installed 133