Manually add v2.20 change log (#1816)

Closes #1772.

Signed-off-by: Luke Murphy <[email protected]>

CHANGELOG.rst

@@ -2,14 +2,8 @@
 History
 *******
 
-Unreleased
-==========
-
-* Molecule can now be called as a python module (python -m molecule). Patch by `@ssbarnea`_.
-* Add `Travis CI integration`_ and fix related test issues.
-
-.. _`@ssbarnea`: https://github.com/ssbarnea
-.. _`Travis CI integration`: https://travis-ci.com/ansible/molecule
+2.20
+====
 
 Important Changes
 -----------------
@@ -20,6 +14,45 @@ Important Changes
 .. _`Move to Red Hat`: https://molecule.readthedocs.io/en/latest/contributing.html#move-to-red-hat
 .. _`quay.io`: https://quay.io/repository/ansible/molecule
 
+Other
+-----
+
+* Remove mandatory ``-r`` option for ``molecule init scenario``.
+* Make the default scenario use the parent folder.
+* Fix support for honouring environment variables such as ``MOLECULE_DEBUG``.
+* Allow to customise the location of the ``Dockerfile.j2`` with the ``dockerfile`` option for the Docker driver.
+* Add integer type coercion for the ``exposed_ports`` platform option.
+* Add support for honouring ``PY_COLORS`` environment variable.
+* Disable YAML lint truthy rule by default.
+* Add validation for non-unique platform instance names.
+* Add 'Getting Started' guide to the documentation for the benefit of new users.
+* Allow to specify extra inventory sources not created by Molecule.
+* Avoid including assets in the package ``sdist``.
+* Add ``openssh-client`` to the Molecule Docker image.
+* Fix ``ca-certificates`` installation for OpenSUSE.
+* Add ``purge_networks`` option to the Docker driver.
+* Add ``pid_mode`` option to the Docker driver.
+* Constrain ``ansible-lint`` to ``>=4.0.2,<5``.
+* Add the Linode driver (API v3).
+* Provide documented example for using ``systemd`` enabled Docker images.
+* Add ``winrm`` connection support for the delegated driver.
+* Remove usage of ``sudo pip ..`` in driver installation documentation.
+* Add ``override_command`` option to the Docker driver for overriding ``CMD`` directives.
+* Only recommend to install ``'molecule[docker]'`` in the ``INSTALL.rst`` for the Docker driver.
+* Sort scenario execution order by directory name.
+* Fix Python package install for Docker ``prepare.yml`` on Fedora Rawhide.
+* Update SHA-256 hash for the Goss binary.
+* Remove ``Detox`` (deprecated) configuration example from ``Tox`` documentation.
+* Add ``CODE_OF_CONDUCT.md``.
+* Add optional ``cleanup`` sequence step.
+* Allow to customise configuration file location with ``MOLECULE_GLOB`` environment variable.
+* Molecule can now be called as a Python module (``python -m molecule``). Patch by `@ssbarnea`_.
+* Add `Travis CI integration`_ and fix related test issues.
+* Add Docker ``buildargs`` option for configuring the ``docker_image`` ``create.yml`` build step.
+
+.. _`@ssbarnea`: https://github.com/ssbarnea
+.. _`Travis CI integration`: https://travis-ci.com/ansible/molecule
+
 2.19
 ====
 
@@ -410,7 +443,7 @@ Breaking Changes
 * Correct env path qualification.
 * Add sudo package to Fedora section of Dockerfile template.
 * Correct ANSIBLE_ROLES_PATH path component.
-* Allow re-run of prepare playbook. 
+* Allow re-run of prepare playbook.
 
 2.3
 ===