Allow Convertibles to be converted by >= 1 converters.
Update continuous-integration.md

Fix typo
Refactor based on jekyll-watch clean-up.

https://github.com/jekyll/jekyll-watch/pull/5
Bump jekyll-watch version to 1.1.
Removing indentation that was causing some paragraphs to be interpreted as code blocks
It's called Jekyll::Watcher
Use case-insensitive checking for the file extensions when loading config files.
Remove tests for the Command.ignored_paths method which now lives in jekyll-watch.
Don't need to capture the group.
Merge pull request #2717 from hockeybuggy/fenced-paragraphs
Update history to reflect merge of #2717 [ci skip]
Use `null` in YAML instead of `nil`
Read in every Document's content as UTF-8
Add magic comments for UTF-8
Merge pull request #2718 from jekyll/case-insensitive-extnames
Update history to reflect merge of #2718 [ci skip]
Merge pull request #2719 from pathawks/null-not-nil
Update history to reflect merge of #2719 [ci skip]
Pass in options to File.open in Document.
Merge pull request #2720 from jekyll/read-in-utf8