chore(deps): update dependency ember-auto-import to v2

Author: renovate[bot]

package.json

@@ -45,7 +45,7 @@
     "@glimmer/tracking": "1.0.4",
     "babel-eslint": "10.1.0",
     "broccoli-asset-rev": "3.0.0",
-    "ember-auto-import": "1.11.3",
+    "ember-auto-import": "2.6.3",
     "ember-cli": "3.26.1",
     "ember-cli-dependency-checker": "3.2.0",
     "ember-cli-inject-live-reload": "2.1.0",