nvchecker-notify: try Notify 0.8

fixes #217.

scripts/nvchecker-notify

@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 # MIT licensed
-# Copyright (c) 2020 lilydjwg <lilydjwg@gmail.com>, et al.
+# Copyright (c) 2020,2022 lilydjwg <lilydjwg@gmail.com>, et al.
 
 '''
 A simple wrapper to show desktop notifications while running nvchecker.
@@ -11,7 +11,10 @@ import subprocess
 import json
 
 import gi
-gi.require_version('Notify', '0.7')
+try:
+  gi.require_version('Notify', '0.8')
+except ValueError:
+  gi.require_version('Notify', '0.7')
 from gi.repository import Notify
 
 def get_args():