Merge branch 'robbert/no_later_proper' into 'master'

Get rid of `later_proper'`

See merge request !82
5 jobs from master in 7 minutes and 58 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #5205
fp-timing
build-coq.8.6.1

00:03:37

passed #5204
fp-timing
build-coq.8.7.0

00:03:29

passed #5203
fp-timing
build-coq.8.7.dev

00:02:55

 
  Deploy
passed #5206
opam

00:00:14

passed #5207
reverse-deps

00:00:13