Bump libhandy to 0.0.8

This ensures we use the latest fixes.

Fixes GNOME/epiphany#680
3 jobs for libhandy-008 in 3 minutes and 54 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #218386
flatpak

00:02:56

 
  Deploy
passed #218387
review

00:00:34

failed #218388
allowed to fail manual
stop_review

00:00:23

 
Name Stage Failure
failed
stop_review Deploy
Using Docker executor with image fedora:29 ...
Pulling docker image fedora:29 ...
Using docker image sha256:26ffec5b4a8ad65083424903b7aa175953329413fe5cc4c0dac6fedbe81f2fbb for fedora:29 ...
Running on runner-d836cf30-project-3444-concurrent-0 via gcc150.bak.milne.osuosl.org...
Cloning repository...
Cloning into '/builds/Community/Purism/epiphany'...
Checking out 2485f0f3 as libhandy-008...
fatal: reference is not a tree: 2485f0f351914fb89566077714eaddde1531d572
ERROR: Job failed: exit code 1