Remove unneeded peers (#248)

Author: mkszepp

ember-fontawesome/package.json

@@ -106,9 +106,7 @@
   },
   "peerDependencies": {
     "@fortawesome/fontawesome-svg-core": "^6.6.0",
-    "@glimmer/component": ">= 1.1.2",
-    "@glimmer/tracking": "^1.1.2",
-    "ember-source": "^3.28.0 || ^4.0.0 || >=5.0.0"
+    "@glimmer/component": ">= 1.1.2"
   },
   "publishConfig": {
     "registry": "https://registry.npmjs.org"