Util.Cache.Lru: Workaround missing generic type argument

See merge request !721

Fix accessibility issues with initializer of constants

See merge request !720

Misc build fixes

See merge request !703

Split Client and JS Tests

See merge request !711

build: Depend on vala >= 0.48.18

Closes #1248

See merge request !709

Flatpak: Update snowball patch

See merge request !710

This gives each suite a longer time and keeps things separate.

Suggested in !670

Without that the client tests fail like

  ** (test-client:74671): CRITICAL **: 11:32:40.613: void webkit_user_content_manager_add_style_sheet(WebKitUserContentManager*, WebKitUserStyleSheet*): assertion 'styleSheet' failed

This was so far masked since the composer-page-state-test JS tests did
that but test suites should be independent.

Upstream wiggled the makefile a bit

the `GUri` bindings were added past vala 0.48

```
$ git log -1 --pretty=oneline 3c69e297eda4b287a6a37d30d4bf46b83241a453
3c69e297eda4b287a6a37d30d4bf46b83241a453 glib-2.0: Add GLib.Uri bindings (since 2.66)
$ git describe 3c69e297eda4b287a6a37d30d4bf46b83241a453
0.48.2-145-g3c69e297e
```

and would require vala 0.50 but the changes were also backported to
0.48:

$ git log -1 --pretty=oneline e6c95081f8499eda46ca136edcb11b134b58423c
e6c95081f8499eda46ca136edcb11b134b58423c vapi: Update GLib bindings to 2.66
$ git describe e6c95081f8499eda46ca136edcb11b134b58423c
0.48.17-29-ge6c95081f

and are contained in the released 0.48.18.

Closes: #1248

Andika Triwidada authored May 31, 2021 and Administrator committed May 31, 2021

(cherry picked from commit bc889d41)