Update ember-auto-import to v2

This is a requirement for the ember-release CI job.

packages/router/package.json

@@ -50,7 +50,7 @@
     "babel-eslint": "^10.1.0",
     "broccoli-asset-rev": "^3.0.0",
     "cross-env": "^7.0.3",
-    "ember-auto-import": "^1.11.3",
+    "ember-auto-import": "^2.2.0",
     "ember-cli": "~3.28.4",
     "ember-cli-dependency-checker": "^3.2.0",
     "ember-cli-inject-live-reload": "^2.1.0",

yarn.lock

@@ -7245,41 +7245,6 @@ ember-auto-import@^1.10.1, ember-auto-import@^1.11.2:
     walk-sync "^0.3.3"
     webpack "^4.43.0"
 
-ember-auto-import@^1.11.3:
-  version "1.12.0"
-  resolved "https://registry.yarnpkg.com/ember-auto-import/-/ember-auto-import-1.12.0.tgz#52246b04891090e2608244e65c4c6af7710df12b"
-  integrity sha512-fzMGnyHGfUNFHchpLbJ98Vs/c5H2wZBMR9r/XwW+WOWPisZDGLUPPyhJQsSREPoUQ+o8GvyLaD/rkrKqW8bmgw==
-  dependencies:
-    "@babel/core" "^7.1.6"
-    "@babel/preset-env" "^7.10.2"
-    "@babel/traverse" "^7.1.6"
-    "@babel/types" "^7.1.6"
-    "@embroider/core" "^0.33.0"
-    babel-core "^6.26.3"
-    babel-loader "^8.0.6"
-    babel-plugin-syntax-dynamic-import "^6.18.0"
-    babylon "^6.18.0"
-    broccoli-debug "^0.6.4"
-    broccoli-node-api "^1.7.0"
-    broccoli-plugin "^4.0.0"
-    broccoli-source "^3.0.0"
-    debug "^3.1.0"
-    ember-cli-babel "^7.0.0"
-    enhanced-resolve "^4.0.0"
-    fs-extra "^6.0.1"
-    fs-tree-diff "^2.0.0"
-    handlebars "^4.3.1"
-    js-string-escape "^1.0.1"
-    lodash "^4.17.19"
-    mkdirp "^0.5.1"
-    resolve-package-path "^3.1.0"
-    rimraf "^2.6.2"
-    semver "^7.3.4"
-    symlink-or-copy "^1.2.0"
-    typescript-memoize "^1.0.0-alpha.3"
-    walk-sync "^0.3.3"
-    webpack "^4.43.0"
-
 ember-auto-import@^2.2.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/ember-auto-import/-/ember-auto-import-2.2.0.tgz#6206be37e676fb490f03dd20afab973d5abe9da9"