Update gedit to 3.36.2

python based plugins need libpeas' py-gobject dep to be reinstated

Many changes including:
* Fix compilation on macOS.
* GSettings schema: enable more features by default (auto-indent,
  display-line-numbers, highlight-current-line and bracket-matching) and set
  default style scheme to 'tango'.
* Bump gedit API version to 3.36.
* New dependency: Tepl, which itself depends on Amtk and uchardet.
- Fix segfault in open document selector (Sebastien)
- Fix several crash bugs (Andrea)
- Switch to meson (Martin)
- Drop autotools support (Jeremy)
- Allow closing tabs with middle-click (Corey)
- Migrate to gettext and stop using intltool (Martin)
- Switch from gtksourceview3 to gtksourceview4 (Christian)
- Port GeditFileChooserDialogGtk to GtkFileChooserNative

(prlw1)