fix: Revert to ember 3.20.3 (#5241)

Author: iamareebjamal

package.json

@@ -126,7 +126,7 @@
     "ember-router-scroll": "^3.3.3",
     "ember-simple-auth": "^3.0.0",
     "ember-simple-auth-token": "^5.2.0",
-    "ember-source": "3.21.3",
+    "ember-source": "3.20.3",
     "ember-table": "^2.2.3",
     "ember-template-lint": "^2.13.0",
     "ember-truth-helpers": "^2.1.0",

yarn.lock

@@ -7620,10 +7620,10 @@ ember-source-channel-url@^2.0.1:
   dependencies:
     got "^8.0.1"
 
-ember-source@3.21.3:
-  version "3.21.3"
-  resolved "https://registry.yarnpkg.com/ember-source/-/ember-source-3.21.3.tgz#c85fae070566468a1e479b1817bc690fe3d03207"
-  integrity sha512-wb9vkm2OLax7D6zo5NqB4/Da78LIsa8t74XGPcHtCg4hv5NhipIIgQEtGgWRgdQAp+vMMeZGwNWxw0Lra8MejA==
+ember-source@3.20.3:
+  version "3.20.3"
+  resolved "https://registry.yarnpkg.com/ember-source/-/ember-source-3.20.3.tgz#fdc0e8d9a402985783a2c53729f75abbb7b2ac95"
+  integrity sha512-Fpz0eVFcL4s74d2mw5D3RFGlhRcljB6N4RyjsuumwYTlg7UMrkDdlHy7A1ZI2tDw2Cz7uE7W2dKzSnCQcZGcVQ==
   dependencies:
     "@babel/helper-module-imports" "^7.8.3"
     "@babel/plugin-transform-block-scoping" "^7.8.3"