* refactor: introduce Fixtures util class
* refactor: align yarn.spec
* refactor: move fs mocks to __mocks__ folder
* refactor: improve fs-extra mock
* refactor: move callsite to dev deps
* refactor: use fixtures class
* refactor: use fixtures class
* refactor: reduce external variables in tests
* refactor: improve Fixtures
* refactor: add type for realFs
* refactor: remove obsolete snapshot
* fix: by comments
* refactor: provide ability to spy on mocked fs methods
* refactor: fix build
* refactor: fix by comments
* refactor: add docs
* refactor: fix unit test
* refactor: return called times checks
* refactor: fix by comments
* refactor: adjust unit test
* refactor: adjust unit test
* refactor: fix unit test
* refactor: fix by comments
* refactor: fix by comments
* refactor: update jsdoc
* refactor: fix by comments
Co-authored-by: Rhys Arkins <rhys@arkins.net>
Co-authored-by: Jamie Magee <jamie.magee@gmail.com>
Co-authored-by: Michael Kriese <michael.kriese@visualon.de>
Maksim