(release): 21.0.0-alpha.1

(release): 20.1.0

(release): 20.0.0

(release): 19.0.0

(release): 18.0.0

(release): 17.1.0

(release) 17.0.0

(release) 16.1.1

Merge branch 'master' of github.com:swimlane/ngx-datatable into relea…

…se/16.1.0

(release): 16.0.3