Mark extensions that require only public API

Extensions that use public Shell API are expected to work for all
stable 3.0 releases, so we skip setting the minor version. (This
means that they'll work in 3.0.0 and 3.0.1 without rebuilding).
Notably absent are auto-move-windows and windowsNavigator, that
hook deep into Shell code and could be broken by next minor release.

extensions/alternate-tab/metadata.json.in

@@ -3,7 +3,7 @@
 "name": "AlternateTab",
 "description": "A replacement for Alt-Tab, allows to cycle between windows and does not group by application",
 "original-author": "thomas.bouffon@gmail.com",
-"shell-version": [ "2.91.5", "@shell_current@" ],
+"shell-version": [ "3.0" ],
 "localedir": "@LOCALEDIR@",
 "url": "@url@"
 }

extensions/alternative-status-menu/metadata.json.in

@@ -2,7 +2,7 @@
  "uuid": "@uuid@",
  "name": "Alternative Status Menu",
  "description": "Replaces GNOME Shell Status Menu with one showing Suspend/Hibernate and Power Off as separate items",
- "shell-version": [ "@shell_current@" ],
+ "shell-version": [ "3.0" ],
  "localedir": "@LOCALEDIR@",
  "url": "@url@"
 }

extensions/dock/metadata.json.in

@@ -3,7 +3,7 @@
 "name": "Dock",
 "description": "A dock for the GNOME Shell -- displays favorite and running applications",
 "original-author": "tclaesson@gmail.com",
-"shell-version": [ "@shell_current@" ],
+"shell-version": [ "3.0" ],
 "localedir": "@LOCALEDIR@",
 "url": "@url@"
 }

extensions/example/metadata.json.in

@@ -2,7 +2,7 @@
  "uuid": "@uuid@",
  "name": "Hello, World!",
  "description": "An example extension to show how it works. Shows Hello, world when clicking on the top panel.",
- "shell-version": [ "@shell_current@" ],
+ "shell-version": [ "3.0" ],
  "localedir": "@LOCALEDIR@",
  "url": "@url@"
 }

extensions/gajim/metadata.json.in

@@ -2,7 +2,7 @@
  "uuid": "@uuid@",
  "name": "Gajim IM integration",
  "description": "Display Gajim incoming chats as notifications in the Shell message tray.",
- "shell-version": [ "@shell_current@" ],
+ "shell-version": [ "3.0" ],
  "localedir": "@LOCALEDIR@",
  "url": "http://base-art.net"
 }

extensions/user-theme/metadata.json.in

@@ -2,7 +2,7 @@
  "uuid": "@uuid@",
  "name": "User Themes",
  "description": "Load shell themes from user directory",
- "shell-version": [ "@shell_current@" ],
+ "shell-version": [ "3.0" ],
  "localedir": "@LOCALEDIR@",
  "original-authors": [ "john.stowers@gmail.com" ],
  "url": "@url@"

extensions/xrandr-indicator/metadata.json.in

@@ -2,7 +2,7 @@
 "uuid": "@uuid@",
 "name": "Monitor Status Indicator",
 "description": "Add a systems status menu for rotating monitors (overrides what is currently provided by gnome-settings-daemon)",
-"shell-version": [ "@shell_current@" ],
+"shell-version": [ "3.0" ],
 "localedir": "@LOCALEDIR@",
 "url": "@url@"
 }