Update dependency ember-source to v3.28.8

Author: renovate-bot

package.json

@@ -51,7 +51,7 @@
     "ember-page-title": "6.2.2",
     "ember-qunit": "5.1.5",
     "ember-resolver": "8.0.3",
-    "ember-source": "3.28.7",
+    "ember-source": "3.28.8",
     "ember-source-channel-url": "3.0.0",
     "ember-template-lint": "3.14.0",
     "ember-try": "1.4.0",

yarn.lock

@@ -5140,10 +5140,10 @@ ember-source-channel-url@^1.0.1:
   dependencies:
     got "^8.0.1"
 
-[email protected].7:
-  version "3.28.7"
-  resolved "https://registry.yarnpkg.com/ember-source/-/ember-source-3.28.7.tgz#80abaa5de0995c8ae13c7761d1f99cba20b821fe"
-  integrity sha512-N+whv43SXHiTl93z33LULaxe24jAJGq7IORVBBevGZ3N4mDxe5OpH3jiNfr4HT48Xp8OLxa/cOH73NkEoQAS4w==
+[email protected].8:
+  version "3.28.8"
+  resolved "https://registry.yarnpkg.com/ember-source/-/ember-source-3.28.8.tgz#c58fd4a1538d6c4b9aebe76c764cabf5396c64d9"
+  integrity sha512-hA15oYzbRdi9983HIemeVzzX2iLcMmSPp6akUiMQhFZYWPrKksbPyLrO6YpZ4hNM8yBjQSDXEkZ1V3yxBRKjUA==
   dependencies:
     "@babel/helper-module-imports" "^7.8.3"
     "@babel/plugin-transform-block-scoping" "^7.8.3"