elifecleaner 0.72.0

Added: pub_history.prune_history_data(), return history data related to doi for versions less than version provided
Added: prc.set_article_id(), add article-id tags
Added: prc.set_volume(), set volume tag text, add volume tag if not present
Added: prc.set_elocation_id(), set elocation-id tag text, add elocation-id tag if not present
Added: prc.set_article_categories(), add tags to article-categories tag
Added: prc.set_license_tag(), add license tag to parent tag
Added: prc.set_permissions(), add license data to permissions tag
Added: prc.editor_contributors(), populate Contributor objects with editor data from a docmap
Added: prc.set_editors(), set editor contrib tags

Versions of libraries in requirements are bumped for compatibility.

Code merged in PR #173