Revert "clean"

This reverts commit d6d487f2b6.

.gitmodules

@@ -1,3 +1,9 @@
 [submodule "dotbot"]
 	path = dotbot
-	url = https://github.com/anishathalye/dotbot
+	url = https://github.com/anishathalye/dotbot
+[submodule "pure"]
+	path = pure
+	url = https://github.com/sindresorhus/pure.git
+[submodule "z"]
+	path = z
+	url = https://github.com/rupa/z.git