Enhancements:
-------------

* add libgcc to build dependencies for R skeleton recipes that require compilation  $1969

Bug fixes:
----------

* fix entry points, test commands, test imports from top-level recipe from applying to subpackages  #1933
* fix preferred_env in index.json  #1941
* do not add python.app to run_reqs multiple times  #1981
* Fix $ORIGIN replacement from extra trailing slash  #1981
* Remove error when _license package exists in folder where ``conda index`` is called  #2005
* fix STDLIB_DIR so that it is always defined (based on python version in configuration)  #2006
* Clean up lock files after builds complete or fail to avoid permission errors  #2007