Exclude all bots from user lists.

When listing committers and/or commenters, make sure to exclude, not
only 'github-actions[bot]', but *any* bot from the list, for the same
reasons we excluded 'github-actions[bot]' in the first place: it's not
informative for most purposes, and this causes issues when the list is
later used to expand the `user:*` selector.

closes #18

incenp/grainyhead/repository.py

@@ -74,7 +74,7 @@ def committers(self):
             self._committers = [
                 l.login
                 for l in self._provider.committers
-                if l.login != 'github-actions[bot]'
+                if not l.login.endswith('[bot]')
             ]
         return self._committers
 
@@ -84,13 +84,13 @@ def commenters(self):
             commenters = [
                 i.user.login
                 for i in self.all_issues
-                if i.user.login != 'github-actions[bot]'
+                if not i.user.login.endswith('[bot]')
             ]
             commenters.extend(
                 [
                     c.user.login
                     for c in self.comments
-                    if c.user.login != 'github-actions[bot]'
+                    if not c.user.login.endswith('[bot]')
                 ]
             )
             self._commenters = list(set(commenters))