`working_directory` is no longer required, defaults to `~/project/`


working_directory is no longer required in your CircleCI 2.0 .circleci/config.yml.

If not specified it will default to ~/project/

This can be useful to enable things like this:

  - checkout
  - run:
      command: echo unit test
      working_directory: unit_tests

  - run:
      command: echo integ test
      working_directory: integ_tests

These will be relative to the global working_directory

We’re in the process of updating the docs to reflect this change.

Issue with migration from 1.0 to 2.0