[FEATURE] Publish stable types for Ember

broccoli/packages.js

@@ -140,6 +140,12 @@ module.exports.backburnerES = function _backburnerES() {
   return funnelLib('backburner.js', 'dist/es6', {
     files: ['backburner.js'],
     annotation: 'backburner es',
+    // This write the "output" to `backburner.js.js` in the funnel, which means
+    // that when it gets fed into the Babel AMD transform, which (implicitly)
+    // pulls off the trailing `.js`, the result is just `backburner.js`, which
+    // is the actual Node-resolve-able (and therefore TS-resolve-able) ES module
+    // on disk.
+    getDestinationPath: (relativePath) => relativePath + '.js',
   });
 };
 

packages/@ember/-internals/glimmer/index.ts

@@ -450,7 +450,7 @@ export { default as Input } from './lib/components/input';
 export { default as LinkTo } from './lib/components/link-to';
 export { default as Textarea } from './lib/components/textarea';
 export { default as Component } from './lib/component';
-export { default as Helper, helper } from './lib/helper';
+export { default as Helper, helper, type FunctionBasedHelper } from './lib/helper';
 export { SafeString, escapeExpression, htmlSafe, isHTMLSafe } from './lib/utils/string';
 export { Renderer, _resetRenderers, renderSettled } from './lib/renderer';
 export {

packages/@ember/-internals/glimmer/lib/component-managers/curly.ts

@@ -219,7 +219,7 @@ export default class CurlyComponentManager
       Object.assign(named, args.named.capture());
 
       for (let i = 0; i < count; i++) {
-        let name = positionalParams[i];
+        let name: string | undefined = positionalParams[i];
         assert('Expected at least one positional param', name);
 
         assert(