Make sure to not clean up during deployment

If we clean up, things like coverage reports will be removed and
we won't get nifty graphs. Lack of nifty graphs makes me sad in
the face.

.travis.yml

@@ -6,6 +6,7 @@ node_js:
 deploy:
   provider: npm
   email: [email protected]
+  skip_cleanup: true
   api_key:
     secure: 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
   on: