meson: update version numbers for 257~rc1

meson.build

@@ -20,8 +20,8 @@ else
         project_minor_version = '0'
 endif
 
-libsystemd_version = '0.39.0'
-libudev_version = '1.7.9'
+libsystemd_version = '0.40.0'
+libudev_version = '1.7.10'
 
 conf = configuration_data()
 conf.set_quoted('PROJECT_URL', 'https://systemd.io/')

meson.version

@@ -1 +1 @@
-257~devel
+257~rc1