[skip netlify]: Bump @ember/test-helpers from 2.2.6 to 2.2.8

Bumps [@ember/test-helpers](https://github.com/emberjs/ember-test-helpers) from 2.2.6 to 2.2.8.
- [Release notes](https://github.com/emberjs/ember-test-helpers/releases)
- [Changelog](https://github.com/emberjs/ember-test-helpers/blob/master/CHANGELOG.md)
- [Commits](emberjs/ember-test-helpers@v2.2.6...v2.2.8)

---
updated-dependencies:
- dependency-name: "@ember/test-helpers"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -38,7 +38,7 @@
   },
   "devDependencies": {
     "@ember/optional-features": "^2.0.0",
-    "@ember/test-helpers": "^2.2.6",
+    "@ember/test-helpers": "^2.2.8",
     "@embroider/test-setup": "^0.42.1",
     "@glimmer/component": "^1.0.4",
     "@glimmer/tracking": "^1.0.4",

yarn.lock

@@ -1189,19 +1189,19 @@
   dependencies:
     ember-cli-babel "^7.4.0"
 
-"@ember/test-helpers@^2.2.6":
-  version "2.2.6"
-  resolved "https://registry.yarnpkg.com/@ember/test-helpers/-/test-helpers-2.2.6.tgz#48a5dd6f871dd531c81edfee8094991fd932dc12"
-  integrity sha512-nsrIeFeA2ZChLYp+qgOjpDKo0a294PVRJ3XZtid2alF4VjNTJPl+tyjQfnPje5kcQtADZlIGOqemNYC3HTo4Lg==
+"@ember/test-helpers@^2.2.8":
+  version "2.2.8"
+  resolved "https://registry.yarnpkg.com/@ember/test-helpers/-/test-helpers-2.2.8.tgz#3f1c1ab828098e4a6a6209b7c28b124ac614a73f"
+  integrity sha512-1en4cBDoI3+1xtl7k5QtGpPgKmuvF0D7Azs0JSlv3ttV1Fxb3ukLZ/2Giz1IOEMogO4B+k7fGFeYpANVJuNWqA==
   dependencies:
-    "@ember/test-waiters" "^2.4.3"
+    "@ember/test-waiters" "^2.4.4"
     broccoli-debug "^0.6.5"
-    broccoli-funnel "^3.0.3"
-    ember-cli-babel "^7.26.4"
+    broccoli-funnel "^3.0.6"
+    ember-cli-babel "^7.26.6"
     ember-cli-htmlbars "^5.7.1"
     ember-destroyable-polyfill "^2.0.3"
 
-"@ember/test-waiters@^2.3.0", "@ember/test-waiters@^2.4.3":
+"@ember/test-waiters@^2.3.0", "@ember/test-waiters@^2.4.4":
   version "2.4.4"
   resolved "https://registry.yarnpkg.com/@ember/test-waiters/-/test-waiters-2.4.4.tgz#4239d4cd9c60dc081d83e031463c22a628db028e"
   integrity sha512-dhz4WplPWEPZ0Z8iJBI0uvUurv6Sk4aogNiI1XQxDXDNT13aE4WI/uQdsZXZtC+4xOUkz5V6Ob7iaEHDMixjbw==
@@ -6233,7 +6233,7 @@ ember-cli-babel@^6.0.0-beta.4, ember-cli-babel@^6.11.0, ember-cli-babel@^6.8.2:
     ember-cli-version-checker "^2.1.2"
     semver "^5.5.0"
 
-ember-cli-babel@^7.0.0, ember-cli-babel@^7.1.0, ember-cli-babel@^7.1.2, ember-cli-babel@^7.1.3, ember-cli-babel@^7.10.0, ember-cli-babel@^7.11.1, ember-cli-babel@^7.13.0, ember-cli-babel@^7.13.2, ember-cli-babel@^7.17.2, ember-cli-babel@^7.19.0, ember-cli-babel@^7.20.2, ember-cli-babel@^7.20.5, ember-cli-babel@^7.22.1, ember-cli-babel@^7.23.0, ember-cli-babel@^7.23.1, ember-cli-babel@^7.26.2, ember-cli-babel@^7.26.3, ember-cli-babel@^7.26.4, ember-cli-babel@^7.26.6, ember-cli-babel@^7.4.0, ember-cli-babel@^7.7.3:
+ember-cli-babel@^7.0.0, ember-cli-babel@^7.1.0, ember-cli-babel@^7.1.2, ember-cli-babel@^7.1.3, ember-cli-babel@^7.10.0, ember-cli-babel@^7.11.1, ember-cli-babel@^7.13.0, ember-cli-babel@^7.13.2, ember-cli-babel@^7.17.2, ember-cli-babel@^7.19.0, ember-cli-babel@^7.20.2, ember-cli-babel@^7.20.5, ember-cli-babel@^7.22.1, ember-cli-babel@^7.23.0, ember-cli-babel@^7.23.1, ember-cli-babel@^7.26.2, ember-cli-babel@^7.26.3, ember-cli-babel@^7.26.6, ember-cli-babel@^7.4.0, ember-cli-babel@^7.7.3:
   version "7.26.6"
   resolved "https://registry.yarnpkg.com/ember-cli-babel/-/ember-cli-babel-7.26.6.tgz#322fbbd3baad9dd99e3276ff05bc6faef5e54b39"
   integrity sha512-040svtfj2RC35j/WMwdWJFusZaXmNoytLAMyBDGLMSlRvznudTxZjGlPV6UupmtTBApy58cEF8Fq4a+COWoEmQ==