urlwatch: update to urlwatch-2.16
* Changelog
** [2.16] -- 2019-01-27
*** Added
- XPath: Handle `/text()` selector (#282)
- Document how to specify cookies to README.md (#264)
- Text Reporter: `minimal` config option to only print a summary (PR#304, fixes #147)
- README.md: Document how to watch Github releases via XPath (#266)
- Support for parsing XML/RSS with XPath (Fixes #281)
- Allow explicit setting of `encoding` for URL jobs (PR#313, contributes to #306)
- Slack Channel Reporter (PR#309)
- ANSI color output on the Windows console via `colorama` (PR#296, closes #295)
- Support for using CSS selectors via the `cssselect` module (PR#321, closes 273)
- `ignore_http_error_codes` is now an option for URL jobs (PR#325, fixes #203)
- `job_defaults` in the config for globally specifying settings (PR#345, closes #253)
- Optional `timeout` (in seconds) for URL jobs to specify socket timeout (PR#348, closes #340)
*** Removed
- Support for JSON storage (dead code that was never used in production; PR#336)
*** Changed
- `HtmlReporter` now also highlights links for browser jobs (PR#303)
- Allow `--features` and `--edit-*` to run without `urls.yaml` (PR#301)
- When a previous run had errors, do not use conditional GETs (PR#313, fixes #292)
- Explicitly specify JSON pretty print `separators` for consistency (PR#343)
- Use data-driven unit tests/fixtures for easier unit test maintenance (PR#344)
*** Fixed
- Fix migration issues with case-insensitive filesystems (#223)
- Correctly reset retry counter when job is added or unchanged (PR#291, PR#314)
- Fix a `FutureWarning` on Python 3.7 with regard to regular expressions (PR#299)
- If the filter list is empty, do not process the filter list (PR#308)
- Fix parsing/sanity-checking of `urls.yaml` after editing (PR#317, fixes #316)
- Fix Python 3.3 compatibility by depending on `enum34` there (PR#311)
- Allow running unit tests on Windows (PR#318)
- Fix migration issues introduced by PR#180 and #256 (PR#323, fixes #267)
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