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

* tell pip to not go find things on PyPI (turn off downloading)  #3109
* new "conda debug" command for creating build/host or test envs for working on recipes  #3237
* new package check: "overdepending" - warns or errors out when your run dependencies include unnecessary shared library packages  #3237
* utilize LIEF for analyzing shared object data, extending capabilities beyond pyldd  #3237

Bug fixes:
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* avoid discarding build string during pin_run_as_build and ensure_valid_spec  #3264
* fix conda index's handling of packages where 'depends' key doesn't exist  #3270
* fix bad inversion assumption about pip's PIP_NO_DEPENDENCIES setting  #3271
* fix regex to allow for whitespace after hyphens in outputs section  #3274, #3275
* handle unicode decode fails in output rewriting  #3279
* fix merge of repodata patches that have keys that don't exist in repo  #3280

Contributors:
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* @bergtholdt
* @isuruf
* @minrk
* @msarahan
* @mingwandroid
* @nehaljwani