CI: Bump APP_DEV_VERSION to 0.5.0.18 [skip ci]

Config.xcconfig

@@ -1,6 +1,6 @@
 APP_DISPLAY_NAME = Trio
 APP_VERSION = 0.5.0
-APP_DEV_VERSION = 0.5.0.17
+APP_DEV_VERSION = 0.5.0.18
 APP_BUILD_NUMBER = 1
 COPYRIGHT_NOTICE =
 DEVELOPER_TEAM = ##TEAM_ID##