Add a few bump commands

Makefile

@@ -10,8 +10,11 @@ bump_major:
 bump_beta:
 	bumpver update --no-fetch --patch --tag=beta --tag-num
 
-bump_beta_next:
-	bumpver update --no-fetch --tag-num --commit
+bump_pre_next:
+	bumpver update --no-fetch --tag-num --commit --commit-message="Bump prerelease number -> {new_version}"
 
-bump_remove_beta_tag:
+bump_dev:
+	bumpver update --no-fetch --patch --tag=dev --tag-num
+
+bump_remove_pre_tag:
 	bumpver update --no-fetch --tag=final --commit --commit-message="Final release from {old_version} to {new_version}"