[emacs] update 6 drones

Update lib/flycheck to  31-187-gff306e3e
Update lib/helm     to v3.0-58-g427a7bc1
Update lib/ivy      to  0.10.0-490-g3d301d7
Update lib/magit    to v2.90.1-46-gb14a7a20
Update lib/org      to release_9.1.14-1043-gcd60a35fe
Update lib/slack    to  99a5750