WORKSPACE: bump rules_pip

Change-Id: I8e5ed9ab7743a71de0c216fa425fe2ecb1bbca81
diff --git a/WORKSPACE b/WORKSPACE
index 58dc8e5..6450987 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -53,7 +53,7 @@
 
 git_repository(
     name = "com_apt_itude_rules_pip",
-    commit = "e5ed5e72bf5a7521244e1d2119821628bbf17263",
+    commit = "ce667087818553cdc4b1a2258fc53df917c4f87c",
     remote = "https://github.com/apt-itude/rules_pip.git",
 )