gplugin/gplugin

Prepare for the 0.39.0 release
v0.39.0
18 months ago, Gary Kramlich
a0a98165f39c
Prepare for the 0.39.0 release

Testing Done:
Ran `ninja dist`

Reviewed at https://reviews.imfreedom.org/r/1981/
gplugin-gtk4/data/plugin-page.ui
gplugin-gtk4/data/plugin-row.ui
gplugin-gtk4/data/view.ui
gplugin-gtk4/gplugin-gtk-plugin-page.c
gplugin-gtk4/gplugin-gtk-plugin-row.c
gplugin-gtk4/gplugin-gtk-view.c
gplugin-gtk4-viewer/data/window.ui
gplugin-gtk4-viewer/gplugin-gtk-viewer-window.c
gplugin-gtk4-viewer/gplugin-gtk-viewer.c
gplugin-query/gplugin-query.c
gplugin/gplugin-core.c
gplugin/gplugin-file-tree.c
gplugin/gplugin-loader.c
gplugin/gplugin-manager.c
gplugin/gplugin-native-loader.c
gplugin/gplugin-native-plugin.c
gplugin/gplugin-options.c
gplugin/gplugin-plugin-info.c
gplugin/gplugin-plugin.c
gplugin/gplugin-private.c
gplugin/gplugin-source.c
gplugin/gplugin-version.c
lua/gplugin-lua-core.c
lua/gplugin-lua-loader.c
lua/gplugin-lua-plugin.c
lua/gplugin-lua-test-lgi.c
python3/gplugin-python3-core.c
python3/gplugin-python3-loader.c
python3/gplugin-python3-plugin.c
python3/gplugin-python3-test-pygobject.c
python3/gplugin-python3-utils.c