Release unstable version 3.90.0

Note that this is the first unstable release of gcr4

NEWS

+gcr 3.90.0:
+- WARNING: this is the alpha release of gcr4, which is a major version bump
+  with several API and ABI breaks.
+- The "gcr" pkgconfig package now no longer contains the UI widgets (i.e. the
+  former "gcr-base" package).
+- "gcr-ui" no longer exists. There is now "gcr-gtk3" and "gcr-gtk4" for the
+  GTK3 and GTK4 versions respectively. These might be removed from by the beta
+  release however, in favor of widgets for each DE (e.g. libadwaita or
+  libgranite or ...).
+- All deprecated API has been removed, as well as most UI-related code. This
+  includes most widgets, GcrColumn and any icons.
+- Most GObject-based code has been updated to use modern constructs like the
+  `G_DECLARE_*` macros
+- "pkcs11.h" and "pkcs11.vapi" have been removed. If you used "pcks11.h", this
+  is provided by the p11-kit package. If you used pkcs11.vapi, you'll have to
+  copy it directly in your repository.
+- The org.gnome.crypto.pgp schema is no longer shipped. The options provided in
+  it are part of GPG configuration files.
+- The minimally required version of Meson is now 0.59
+- All `GcrCollection` based APIs are now ported to `GListModel`.
+- Added lookup of trust assertions for distrusted certs
+- Updated translations
+
 gcr 3.41.0:
 - Port ssh-agent from gnome-keyring [GNOME/gcr!67]
 - build: Fix parallel build failure due to missing marshal dependency [GNOME/gcr!68]