Bump version to 40.alpha

The GNOME project has adopted a new versioning scheme[0], and
GNOME 3.38 will be followed by GNOME 40.

Open the new development cycle by switching to the new scheme, as
well as to post-release bumps as recommended.

[0] https://discourse.gnome.org/t/new-gnome-versioning-scheme/4235

https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1456

meson.build

@@ -1,5 +1,5 @@
 project('gnome-shell', 'c',
-  version: '3.38.1',
+  version: '40.alpha',
   meson_version: '>= 0.53.0',
   license: 'GPLv2+'
 )
@@ -10,7 +10,7 @@ split_version = meson.project_version().split('.')
 # the Cogl and Clutter libraries also use this API version.
 # The API version is increased automatically each development cycle,
 # starting with 0 in 3.23.x
-api_version = (split_version[1].to_int() - 23) / 2
+api_version = split_version[0].to_int() - 32
 mutter_api_version = '@0@'.format(api_version)
 
 clutter_pc = 'mutter-clutter-' + mutter_api_version

subprojects/extensions-app/data/metainfo/org.gnome.Extensions.metainfo.xml.in

@@ -39,14 +39,7 @@
   </description>
 
   <releases>
-    <release version="3.38.1" date="2020-10-05"/>
-    <release version="3.38.0" date="2020-09-14">
-      <desciption>
-        <p>
-          Indicate extension errors.
-        </p>
-      </desciption>
-    </release>
+    <release version="40.alpha" type="development" date="2020-10-05"/>
   </releases>
 
   <screenshots>

subprojects/extensions-app/meson.build

@@ -1,5 +1,5 @@
 project('gnome-extensions-app',
-  version: '3.38.1',
+  version: '40.alpha',
   meson_version: '>= 0.53.0',
   license: 'GPLv2+'
 )

subprojects/extensions-tool/meson.build

@@ -1,5 +1,5 @@
 project('gnome-extensions-tool', 'c',
-  version: '3.38.1',
+  version: '40.alpha',
   meson_version: '>= 0.53.0',
   license: 'GPLv2+'
 )

subprojects/shew/meson.build

@@ -1,5 +1,5 @@
 project('shew', 'c',
-  version: '3.38.1',
+  version: '40.alpha',
   meson_version: '>= 0.53.0',
   license: 'LGPLv2+',
 )