gnome3.webkitgtk: 2.20.5 -> 2.22.2

[r-ryantm]

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools. This update was made based on information from https://repology.org/metapackage/webkitgtk/versions.

meta.description for gnome3.webkitgtk is: '"Web content rendering engine, GTK+ port"'.

Checks done (click to expand)

• built on NixOS
• /nix/store/bmmv72lzz75x3pzbmvgpa272i8xnnidv-webkitgtk-2.22.2/bin/WebKitWebDriver passed the binary check.
• 1 of 1 passed binary check by having a zero exit code.
• 0 of 1 passed binary check by having the new version present in output.
• found 2.22.2 with grep in /nix/store/bmmv72lzz75x3pzbmvgpa272i8xnnidv-webkitgtk-2.22.2
• directory tree listing: https://gist.github.com/64bcd265638dc1ad62ad2935f7140c2b
• du listing: https://gist.github.com/d08139797e2f735d1eb422faa587df38

Instructions to test this update (click to expand)

One-time optional setup to skip building using Cachix:

nix-shell -p cachix --run 'cachix use r-ryantm'

Test this update by entering a nix shell, seeing what is inside the
result, and if applicable, running some binaries:

nix-shell --pure -I nixpkgs=https://github.com/r-ryantm/nixpkgs/archive/51f1bb4cee6510bb33fb933cdebe4d56e9377fc7.tar.gz -p gnome3.webkitgtk
ls -la /nix/store/bmmv72lzz75x3pzbmvgpa272i8xnnidv-webkitgtk-2.22.2

[xeji]

2.22.2 was added in #47949, will be set as default as part of #45950.