Update dependencies

[san650]

Update all dependencies marked as red or yellow in david-dm.org

This PR also removes the blueprint introduced in #274 which is hard to maintain. It's better suited to be its own ember-addon.

Also fixes #320

[coveralls]

Coverage remained the same at 98.063% when pulling bac7831 on update-dependencies into 48454ad on master.

[coveralls]

Coverage remained the same at 98.063% when pulling f157f3e on update-dependencies into 48454ad on master.

[coveralls]

Coverage remained the same at 98.063% when pulling ca7142e on update-dependencies into 48454ad on master.

[coveralls]

Coverage remained the same at 98.063% when pulling 642fafb on update-dependencies into 48454ad on master.

[ro0gr]

Why to drop 1.12. I think we definitely support it

[san650]

I'm almost sure the addon still can be installed with ember-1.12, but its really hard to make our addons tests compatible with those old versions.

ember 1.12 is more than two years old which is a long time in js terms, I think we did a good job keeping it for so long, but it's time to move on 😃 .

Unless someone feels too strong about it, I think it's best to start doing some changes in the code to make it easier to maintain. That's why I'm removing a whole blueprint in this same PR.

[ro0gr]

Yeah this blueprint looked massive. I hope nobody actively use a component-test blueprint 😆

[san650]

Totally, it's a candidate to be its own addon.

#319 (comment)

[coveralls]

Coverage remained the same at 98.063% when pulling de3d4dd on update-dependencies into 48454ad on master.