update pre-commit

Change-Id: Id0d5707be4e1547bdff168700848081bc5483b87

Author: zzzeek

.pre-commit-config.yaml

@@ -8,7 +8,7 @@ repos:
         args: [-l 79]
 
 -   repo: https://github.com/sqlalchemyorg/zimports
-    rev: master
+    rev: v0.4.0
     hooks:
     -   id: zimports