use old ember-cli-babel in lts scenarios

Author: mansona

test-scenarios/scenarios.ts

@@ -8,6 +8,9 @@ async function lts(project: Project) {
   project.linkDevDependency('ember-source', { baseDir: __dirname, resolveName: 'ember-source-lts' });
   project.linkDevDependency('@ember/test-helpers', { baseDir: __dirname, resolveName: 'ember-test-helpers-lts' });
 
+  // ember-cli-babel@8 doesn't work with node 12 because of babel-plugin-module-resolver > glob > minimatch@8 needing at least Node 14
+  project.linkDevDependency('ember-cli-babel', { baseDir: __dirname, resolveName: 'ember-cli-babel-older' });
+
   project.pkg.volta = {
     node: '12.22.1',
   };