Prepare release 3.0

I think the switch from GTK2 to GTK3 warrants a new major version.

CHANGELOG.md

@@ -0,0 +1,38 @@
+# Changelog
+All notable changes to this project will be documented in this file.
+
+The format is loosely based on
+[Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
+
+## [Unreleased]
+
+## [3.0] - 2024-03-28
+
+* New test: Bright pixels
+* New test: fullscreen color gradients
+* Switch build system from Autotools to Meson
+* Upgrade from GTK+ 2 to 3
+
+## [2.1] - 2020-05-10
+
+* Switches from Glade to GtkBuilder
+* Might compile under Windows
+* New test: LCD Alignment
+* Import translations from Debian
+
+## [2.0] - 2017-12-10
+
+* Major overhaul. Now uses GTK+ 2.x and libglade
+* I18N - Please translate! (Has some issues with international characaters,
+  should be solved in the next version)
+* More flexible colour selection, now pops up a colour picker for colours.
+* Make it easier to write new tests.
+
+## 1.0 - 2003-08-07
+
+* This is a new program, so first news is this very existence :-)
+
+[Unreleased]: https://github.com/webcomics/dosage/compare/3.0...HEAD
+[3.0]: https://github.com/TobiX/screentest/compare/2.1...3.0
+[2.1]: https://github.com/TobiX/screentest/compare/2.0...2.1
+[2.0]: https://github.com/TobiX/screentest/compare/01e74ac3322f44b18ec2df185a21e0e7a3f067f3...2.0

README.md

@@ -39,7 +39,7 @@ with using the command line:
 You will need the following to compile this program:
 
 - Meson >= 0.61 (tested with 1.4)
-- GTK+3 >= 3.4 (tested on 3.24)
+- GTK3 >= 3.4 (tested on 3.24)
 - glib >= 2.0 (tested on 2.80)
 
 You will need both the libraries (either in static or dynamic form),

meson.build

@@ -4,7 +4,7 @@ project(
   license: 'GPL-2.0-only',
   # license_files: ['COPYING'], -- needs Meson 1.1, Ubuntu 22.04 is too old
   meson_version: '>= 0.61',
-  version: '2.2-dev',
+  version: '3.0',
 )
 
 i18n = import('i18n')