* Add typings for jest-diff
* Add typings for jest-get-type
* Add typings for jest-matcher-utils
* Enable noImplicitThis option for jest-diff
* Enable noImplicitThis option for jest-get-type
* Enable noImplicitThis option for jest-matcher-utils
* Point jest-diff project URL to GitHub
* Point jest-get=type project URL to GitHub
* Point jest-matcher-utils project URL to GitHub
* Uncomment EXPECTED_BG, RECEIVED_BG variables
Although these variables have been removed on master of the
jest-matcher-utils repo, there has yet to be a release.
Add a TODO to indicate that a future update to these definitions will
be necessary.