Changelog for copilot-libraries-3.3

2021-05-07 * Version bump (3.3). (#217) 2021-03-07 * Version bump (3.2.1). (#126) * Completed the documentation. (#127) 2020-12-06 * Version bump (3.2). * Update description, bug-reports, homepage fields in cabal file (#129). 2019-11-22 Ivan Perez <ivan.perez@nianet.org> * Version bump (3.1).