Bump version to 43.alpha

Update NEWS.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2505>

NEWS

@@ -1,3 +1,41 @@
+43.alpha
+========
+* Drop zenity dependency [Bilal; !2370]
+* Fix initialization of privacy mode in displays that support it [Marco; !2372]
+* Add NightLightSupported property to DisplayConfig [Jonas; !2310]
+* Don't use direct scanout for transparent windows [Sebastian K.; !2409]
+* Improve picking a window for direct scanout [Sebastian K.; !2413]
+* Drop support for obsolete wayland protocols [Fernando; !2207, !2184]
+* Fix --replace again [Jonas; !2432]
+* Do not allow windows to steal focus when the shell has a grab [Carlos; !2433]
+* Fix night light without GAMM_LUT property [Jonas; !2435]
+* Expose Cogl's Snippet API to introspection [Simon; !2422]
+* wayland: Fix rotation transform [Robert; !1055]
+* Build and deploy API documentation [Bilal; !2427]
+* Attach color state information to actors [Naveen; !2443]
+* Fix pointer confinement on HiDPI setups [Jonas; !2460]
+* Fix dma-bufu screencast regression [Jonas; !2462]
+* Fix monitor mirroring in some cases [Jonas; !2492]
+* Parse HDR and Colorimetry CTA-861 EDID extension blocks [Sebastian W.; !2351]
+* Fix cursor tracking during screencasts on X11 [George; !2474]
+* Fixed crashes [Jonas, Florian; !2415, !2364, !2491]
+* Plugged leaks [Michel, Sebastian K.; !2469, !2497]
+* Misc. bug fixes and cleanups [Kazuki, Dor, Jonas, Bilal, Sebastian K.,
+  Christian, Florian, Georges,, Sebastian W., Olivier; !2405, !2406, !2403,
+  !2416, !2398, !2414, !2425, !2354, !2436, !2447, !2446, !2355, !2429, !2417,
+  !2434, !2439, !2015, !2444, !2458, !2379, !2455, !2463, !2484, !2485, !2488,
+  !2499]
+
+Contributors:
+  Marco Trevisan (Treviño), Dor Askayo, George Barrett, Michel Dänzer,
+  Bilal Elmoussaoui, Olivier Fourdan, Carlos Garnacho, Kazuki Hashimoto,
+  Sebastian Keller, Naveen Kumar, Robert Mader, Fernando Monteiro,
+  Florian Müllner, Georges Basile Stavracas Neto, Christian Rauch,
+  Simon Schneegans, Sebastian Wick, Jonas Ådahl
+
+Translators:
+  Zurab Kargareteli [ka], Pawan Chitrakar [ne]
+
 42.1
 ====
 * Send correct LEAVE events when entering windows [Jonas D.; !2321]

meson.build

@@ -1,5 +1,5 @@
 project('mutter', 'c',
-  version: '42.1',
+  version: '43.alpha',
   meson_version: '>= 0.55.0',
   license: 'GPLv2+'
 )