bump libhandy to 0.83.0

Fixes #23
2 jobs for master in 1 minute and 32 seconds
Status Job ID Name Coverage
  Test
failed #806674
flatpak
flatpak

00:00:32

passed #806675
rustfmt

00:01:32

 
Name Stage Failure
failed
flatpak Test
Running after_script
Uploading artifacts for failed job
Uploading artifacts...
WARNING: icon-library-nightly.flatpak: no matching files
WARNING: repo.tar: no matching files
.flatpak-builder/build/icon-library/_flatpak_build/meson-logs/meson-log.txt: found 1 matching files

WARNING: .flatpak-builder/build/icon-library/_flatpak_build/meson-logs/testlog.txt: no matching files
Uploading artifacts to coordinator... ok
id=806674 responseStatus=201 Created token=srZsjeDT
ERROR: Job failed: exit code 1