Adds tests for src/core/Utils
Ports translator tests to jest
Adds tests for core/index
Added code coverage report
Adds tests for core/UppySocket
Adds tests to src/core and cleanup of test directory
Switched from import to require as the project supports node v4
Runs tests using Babel for backwards compatibilty
Adds src/core state tests
Adds src/core reset & close tests
Updates stagnant snapshot
Adds tests for preprocessors and postprocessors in src/core/Core.js
Adds tests for uploaders and metadata in src/core/Core
Adds tests for adding and removing files in src/core/Core
Adds test for getFile
