Load bugsnag using npm
Previously we loaded bugsnag through bower and provided access to the library through a shim.
This release begins including bugsnag using npm instead, allowing fastboot to run with ember-cli-bugsnag.
This also incidentally upgrades bugsnag to 3.0.6, this may cause issues for users.
See #62 and ember-cli-node-assets for more information. Big thanks to @josemarluedke for the contribution! ✨