Bump ember-cli from 3.20.0 to 3.26.1

Bumps [ember-cli](https://github.com/ember-cli/ember-cli) from 3.20.0 to 3.26.1.
- [Release notes](https://github.com/ember-cli/ember-cli/releases)
- [Changelog](https://github.com/ember-cli/ember-cli/blob/master/CHANGELOG.md)
- [Commits](ember-cli/ember-cli@v3.20.0...v3.26.1)

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

Author: dependabot-preview[bot]

package.json

@@ -53,7 +53,7 @@
     "@typescript-eslint/parser": "^2.22.0",
     "babel-eslint": "^10.1.0",
     "broccoli-asset-rev": "^3.0.0",
-    "ember-cli": "~3.20.0",
+    "ember-cli": "~3.26.1",
     "ember-cli-dependency-checker": "^3.2.0",
     "ember-cli-inject-live-reload": "^2.1.0",
     "ember-cli-sri": "^2.1.1",