rubyPackages.gtk3: fix build, add missing dependencies

Changed files
+8
pkgs
development
ruby-modules
gem-config
+8
pkgs/development/ruby-modules/gem-config/default.nix
··· 46 46 tzdata, 47 47 icu, 48 48 libffi, 49 + libdeflate, 50 + xz, 51 + zstd, 52 + libwebp, 49 53 cmake, 50 54 libssh2, 51 55 openssl, ··· 548 552 fribidi 549 553 gobject-introspection 550 554 gtk3 555 + libdeflate 556 + xz 557 + libwebp 558 + zstd 551 559 cairo 552 560 harfbuzz 553 561 lerc