Log Message:
textproc/angle-grinder: update to 0.19.4

v0.19.4

 - drop netbsd from CI, seems to be broken by @rcoh in #205
 - Handle missing optional matches by @ehaas in #204
 - Bump h2 from 0.3.22 to 0.3.26 by @dependabot in #201
 - Bump mio from 0.8.10 to 0.8.11 by @dependabot in #200
 - Bump rustls from 0.21.10 to 0.21.12 by @dependabot in #206

v0.19.3
 - No changelog provided