Adding dependabot to have signed the CLA.

(Which, of course, it hasn't, since it's a bot.)
diff --git a/.clabot b/.clabot
index db2f4ff..9a0b67f 100644
--- a/.clabot
+++ b/.clabot
@@ -5,7 +5,8 @@
 		"banksean",
 		"pokey",
 		"crawshaw",
-		"maruel"
+		"maruel",
+		"dependabot"
 	],
 	"message": "We require contributors to sign our Contributor License Agreement, and we don't have you on file. In order for us to review and merge your code, please contact @crawshaw to get yourself added."
 }