Add apt_list_upgradable rule (#732)

This helps you run `apt list --upgradable` after `apt update`,
as it suggests.

thefuck/rules/apt_list_upgradable.py

@@ -0,0 +1,15 @@
+from thefuck.specific.apt import apt_available
+from thefuck.specific.sudo import sudo_support
+from thefuck.utils import for_app
+
+enabled_by_default = apt_available
+
+
+@sudo_support
+@for_app('apt')
+def match(command):
+    return "Run 'apt list --upgradable' to see them." in command.output
+
+
+def get_new_command(command):
+    return 'apt list --upgradable'