deps: update cats, circe and jgit

* Dependencies:
** cats: 2.0.0-RC2
** circe: 0.12.0-RC4
** jgit: 5.4.2.201908231537-r

Signed-off-by: 35V LG84 <35vlg84-x4e6b92@e257.fi>
3 jobs for master in 14 minutes and 40 seconds
Status Job ID Name Coverage
  Test
passed #284390091
codecov

00:09:48

99.8%
passed #284390087
test·jdk11

00:14:40

passed #284390090
test·jdk8

00:13:13