0.21.3 (2022-03-14) Documentation add 'thanks' page (f9d2df6) chap 30 proof-reading comments from elsie (57a753b) create .all-contributorsrc [skip ci] (580dd81) more thanks (d31c67b) more work on the reading list (12a7d49) suggestions for python cli packages (#174) (9b99b88) update README.md [skip ci] (6e21fd5)