- Update to 2.21:
Added:
* Added --test-reporter REPORTER command-line option to send an
example report using any configured notification service
* JobBase now has main_thread_enter() and main_thread_exit() functions
that can be overridden by subclasses to run code in the main thread
before and after processing of a job
Removed:
* The --test-slack command line option has been removed, you can test
your Slack reporter configuration using --test-reporter slack
Changed:
* The browser job now uses Pyppeteer instead of Requests-HTML for
rendering pages while executing JavaScript; this makes JavaScript
execution work properly
Fixed:
* Applying legacy hooks.py filters

- Update to 2.20:
Added:
* A job can now have a diff_filter set, which works the same way as
the normal filter (and has the same filters available), but applies
to the diff output instead of the page content (can be tested with
--test-diff-filter, needs 2 or more historic snapshots in the cache)
* Documentation now has a section on the configuration settings
(--edit-config)
* New filter: ocr to convert text in images to plaintext
(using Tesseract OCR)
* New reporters:
- ifttt to send an event to If This Then That (ifttt.com)
(#512, by Florian Gaultier)