1.2.20-1.2.21

_ Frank Bennett <https://twitter.com/fgbjr>_

Bump version, update CHANGES, bundle as 1.2.21

commit: 67d6c60
author: Frank Bennett
date: 2019-07-31 08:31 (JST)

Block implicit short title on numeric "main" title

commit: 51fc093
author: Frank Bennett
date: 2019-07-31 08:29 (JST)

Bump version, update CHANGES, bundle as 1.2.20

commit: f6fce9e
author: Frank Bennett
date: 2019-07-22 08:04 (JST)