Try upgrading ember-source and glimmer

Author: NullVoxPopuli

limber/app/services/-compile/babel/cjs-eval.ts

@@ -7,6 +7,7 @@ import Ember from 'ember';
 import _Component from '@glimmer/component';
 import { tracked } from '@glimmer/tracking';
 import { setComponentTemplate } from '@ember/component';
+import * as _helpers from '@ember/helper';
 import _TO from '@ember/component/template-only';
 import { createTemplateFactory } from '@ember/template-factory';
 
@@ -22,6 +23,7 @@ const modules = {
   '@ember/component/template-only': _TO,
   '@glimmer/tracking': { tracked },
   '@ember/modifier': { on: _Ember._on },
+  '@ember/helper': _helpers,
 };
 
 // https://github.com/glimmerjs/glimmer-experimental/blob/master/packages/examples/playground/src/utils/eval-snippet.ts

limber/package.json

@@ -85,7 +85,7 @@
     "ember-page-title": "^6.2.1",
     "ember-qunit": "^5.1.4",
     "ember-resolver": "^8.0.2",
-    "ember-source": "^3.26.1",
+    "ember-source": "^3.27.0-beta.4",
     "ember-template-lint": "^3.2.0",
     "esbuild": "0.11.12",
     "esbuild-plugin-alias": "^0.1.2",
@@ -114,10 +114,10 @@
   },
   "dependencies": {
     "@babel/standalone": "^7.13.15",
-    "@glimmer/compiler": "0.78.0",
-    "@glimmer/component": "^1.0.4",
-    "@glimmer/syntax": "^0.78.0",
-    "@glimmer/tracking": "^1.0.4",
+    "@glimmer/compiler": "0.79.0",
+    "@glimmer/component": "^2.0.0-beta.16",
+    "@glimmer/syntax": "^0.79.0",
+    "@glimmer/tracking": "^2.0.0-beta.16",
     "babel-plugin-htmlbars-inline-precompile": "^5.3.0",
     "dompurify": "^2.2.7",
     "ember-auto-import": "^1.11.2",