gobject-introspection: rename package

camelCase package name was a huge inconsistency in GNOME package set.

pkgs/tools/audio/beets/default.nix

@@ -1,5 +1,5 @@
 { stdenv, fetchFromGitHub, writeScript, glibcLocales, diffPlugins
-, pythonPackages, imagemagick, gobjectIntrospection, gst_all_1
+, pythonPackages, imagemagick, gobject-introspection, gst_all_1
 , fetchpatch
 
 # Attributes needed for tests of the external plugins
@@ -121,7 +121,7 @@ in pythonPackages.buildPythonApplication rec {
     pythonPackages.unidecode
     pythonPackages.gst-python
     pythonPackages.pygobject3
-    gobjectIntrospection
+    gobject-introspection
   ] ++ optional enableAcoustid      pythonPackages.pyacoustid
     ++ optional (enableFetchart
               || enableEmbyupdate

pkgs/tools/audio/playerctl/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, meson, ninja, fetchFromGitHub, glib, pkgconfig, gobjectIntrospection }:
+{ stdenv, meson, ninja, fetchFromGitHub, glib, pkgconfig, gobject-introspection }:
 
 stdenv.mkDerivation rec {
   name = "playerctl-${version}";
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
     sha256 = "0jnylj5d6i29c5y6yjxg1a88r2qfbac5pj95f2aljjkfh9428jbb";
   };
 
-  nativeBuildInputs = [ meson ninja pkgconfig gobjectIntrospection ];
+  nativeBuildInputs = [ meson ninja pkgconfig gobject-introspection ];
   buildInputs = [ glib ];
 
   # docs somehow crashes the install phase: