Added `tmp` to Renovate ignore list

no issue

- `tmp` 0.1.0 is broken but a new release isn't coming any time soon so
  we should ignore it for now

renovate.json

@@ -12,6 +12,7 @@
       "intl-messageformat",
       "moment-timezone",
       "nodemailer",
+      "tmp",
       "validator",
       "simple-dom"
     ],