v7.8.0

What's Changed

• Move to ember-cli@6.1.0 by @onechiporenko in #198

• Move to ember-cli@6.2.0 by @onechiporenko in #202

• Move to ember-cli@6.7.0 by @onechiporenko in #206

• Drop support for lts-4.4 and lts-4.8

Full Changelog: v7.7.0...v7.8.0