INT-1549: Remove stray debugger statement in mongodb-js/debug (#416)

Also put mongodb-js/debug under travisci so it doesn't happen again.

:arrow_up: debug@mongodb-js/debug#v2.2.3
(cherry picked from commit 3a1d4d4)

Author: imlucas

package.json

@@ -92,7 +92,7 @@
     "backoff": "^2.4.1",
     "bootstrap": "https://github.com/twbs/bootstrap/archive/v3.3.5.tar.gz",
     "d3": "^3.5.6",
-    "debug": "mongodb-js/debug#v2.2.2",
+    "debug": "mongodb-js/debug#v2.2.3",
     "debug-menu": "^0.3.0",
     "electron-squirrel-startup": "^0.1.4",
     "font-awesome": "https://github.com/FortAwesome/Font-Awesome/archive/v4.4.0.tar.gz",