Bump ember-concurrency from 1.1.5 to 1.1.6

Bumps [ember-concurrency](https://github.com/machty/ember-concurrency) from 1.1.5 to 1.1.6.
- [Release notes](https://github.com/machty/ember-concurrency/releases)
- [Changelog](https://github.com/machty/ember-concurrency/blob/master/CHANGELOG.md)
- [Commits](machty/ember-concurrency@1.1.5...1.1.6)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -52,7 +52,7 @@
     "ember-cli-sri": "2.1.1",
     "ember-cli-uglify": "^3.0.0",
     "ember-click-outside": "^1.3.0",
-    "ember-concurrency": "^1.1.5",
+    "ember-concurrency": "^1.1.6",
     "ember-css-modules": "^1.3.0-beta.1",
     "ember-css-modules-sass": "^1.0.1",
     "ember-data": "~3.16.0",