Upgrades for 3.10.x

[queenvictoria]

Hi there. I've addressed most things I found that caused this to fail after I upgraded my project.

$ ember-cli-update
$ ember-cli-update --run-codemods
$ npm update

Then

• Repair jQuery
• Repair linting errors

Hope that's useful.

[willviles]

Hey @queenvictoria, thanks for the PR! I'm not currently using this addon in an active project of mine, but I'll carve out some time very shortly to review this for you 👍