Update .clabot

Add @conr2d to the .clabot (see #15)

.clabot

@@ -3,7 +3,8 @@
     "expede",
     "bumblefudge",
     "oed",
-    "chunningham"
+    "chunningham",
+    "conr2d"
   ],
   "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, either [PR in your signature like so](https://github.com/ChainAgnostic/varsig/pull/2/files) if you have no other disclosures to make or reach out to one more of the codeowners (@bumblefudge @expede @oed) to get yourself added manually.",
   "recheckComment": "Thank you for complying with our IP regime! We appreciate the collaboration."