* Fix plugin resolution when path does not start with ./
* Minor consistency fix: use "if (resolvedPluginSearchDir) {...}" in load-plugins
* Use more appropriate quotes in plugin-resolution.js
* Try both local paths and node modules when resolving plugins manually
* Test bespoke plugin loading by node module name
* Simplify getFileInfo() as suggested by @j-f1
https://github.com/prettier/prettier/pull/4341#discussion_r187112707
* Implement prettier.getFileInfo() method and --file-info CLI option
* Add empty line between functions in index.js
* Support --plugin-search-dirs / pluginSearchDirs() in --file-info / getFileInfo()
* Address review comments by @ikatyang
* Fix plugin API in globally installed Prettier and introduce optional --plugin-search-dir
* Use find-parent-dir instead of find-up and test autoloading (with mocked fn)
* Add two test cases where --plugin-search-dir is not .
* Do not mutate pluginSearchDirs argument in load-plugins.js
* Do not test automatic plugin resolution as mocking of "find-parent-dir" does not work due to rollup
* Document --plugin-search-dir / pluginSearchDirs and improve spacing
* Address @ikatyang's review comments
* Fix require path for third-party
* Undo alphabetic sorting of third-party scripts
Alexander Kachkaev
