Update Glimmer.js to the latest

Updates Glimmer.js to the latest, and also updates a number of APIs:

\## Breaking Changes

- Removes `@glimmerx/babel-plugin-component-templates`, replaces it with
  `@glimmerx/babel-preset` which wraps `@glimmer/babel-preset`. This
  uses `babel-plugin-htmlbars-inline-precompile`, which is the same
  inline precompiler used by Ember.js now, so we are synced between the
  two frameworks.
- Removes support for Ember < 3.25, `@glimmerx/component` will only work
  with versions of Ember that support strict mode.
- Adds `@glimmerx/webpack-loader`, which is now required to run before
  the Babel loader.
- Removes `TemplateArgs` export as a type.

\## Other Changes

- Adds support for `.gts` and `.gjs`
- Re-exports `fn` and `on` from Ember for usage in the Ember version of
  the addons
- Implements `helper()` for use in defining helpers in Ember

.eslintignore

@@ -10,7 +10,7 @@
 **/bower_components/**
 
 # Fixtures
-**/packages/@glimmerx/babel-plugin-component-templates/test/**/code.js
-**/packages/@glimmerx/babel-plugin-component-templates/test/**/output.js
-**/packages/@glimmerx/babel-plugin-component-templates/test/**/code.ts
-**/packages/@glimmerx/babel-plugin-component-templates/test/**/output.ts
+**/packages/@glimmerx/babel-preset/test/**/code.js
+**/packages/@glimmerx/babel-preset/test/**/output.js
+**/packages/@glimmerx/babel-preset/test/**/code.ts
+**/packages/@glimmerx/babel-preset/test/**/output.ts

.eslintrc.js

@@ -5,6 +5,9 @@ module.exports = {
     ecmaVersion: 2019,
     sourceType: 'module',
   },
+  env: {
+    es6: true,
+  },
   extends: [
     'eslint:recommended',
     'plugin:prettier/recommended',
@@ -30,7 +33,6 @@ module.exports = {
         '**/scripts/**/*.js',
         '**/blueprints/**/*.js',
         'webpack.config.js',
-        'packages/babel-plugins/**/*.js',
         'packages/@glimmerx/blueprint/index.js',
       ],
       env: {
@@ -40,19 +42,9 @@ module.exports = {
     },
     {
       files: [
-        'packages/@glimmerx/babel-plugin-component-templates/**/*.js',
+        'packages/@glimmerx/babel-preset/**/*.js',
         'packages/@glimmerx/eslint-plugin/**/*.js',
-      ],
-      env: {
-        es6: true,
-        node: true,
-        mocha: true,
-      },
-    },
-    {
-      files: [
-        'packages/@glimmerx/babel-plugin-component-templates/test/**/code.js',
-        'packages/@glimmerx/babel-plugin-component-templates/test/**/output.js',
+        'packages/@glimmerx/webpack-loader/**/*.js',
       ],
       env: {
         es6: true,
@@ -67,17 +59,6 @@ module.exports = {
         'no-process-exit': 'off',
       },
     },
-    // source Js
-    {
-      files: ['**/src/**/*.js', '**/test/**/*.js'],
-      env: {
-        es2020: true,
-        browser: true,
-      },
-      parserOptions: {
-        sourceType: 'module',
-      },
-    },
     // TypeScript source
     {
       files: ['**/*.ts'],
@@ -91,9 +72,19 @@ module.exports = {
         '@typescript-eslint/explicit-function-return-type': 'error',
         '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
 
+        '@typescript-eslint/ban-types': ['error', {
+          types: {
+            // we currently use `object` as "valid WeakMap key" in a lot of APIs
+            object: false,
+          }
+        }],
+
         // We should try to remove this eventually
         '@typescript-eslint/explicit-function-return-type': 'off',
 
+        // We should also try to remove this eventually
+        '@typescript-eslint/ban-ts-ignore': 'off',
+
         // disabling this one because of DEBUG APIs, if we ever find a better
         // way to suport those we should re-enable it
         '@typescript-eslint/no-non-null-assertion': 'off',

.github/workflows/ci.yml

@@ -35,7 +35,7 @@ jobs:
 
       strategy:
         matrix:
-          ember-version: [default, release, beta, canary, lts-3.16]
+          ember-version: [default, release, beta, canary, "3.25"]
 
       steps:
         - uses: actions/checkout@v2

.prettierignore

@@ -1 +1 @@
-packages/@glimmerx/babel-plugin-component-templates/test/
+packages/@glimmerx/babel-preset/test/

README.md

@@ -54,11 +54,11 @@ npm:
 yarn add @glimmerx/core @glimmerx/component
 ```
 
-You will also need to install a Babel plugin that compiles templates with the
-Glimmer compiler:
+You will also need to install a Babel preset that handles Glimmer templates and
+other language features, such as decorators and class fields:
 
 ```
-yarn add -D @glimmerx/babel-plugin-component-templates
+yarn add -D @glimmerx/babel-preset
 ```
 
 If using ESLint, you will also want to install / use the plugin provided, as the `no-unused-vars` core rule will fail without it

package.json

@@ -20,7 +20,7 @@
     "start": "webpack-dev-server",
     "storybook": "yarn build && yarn workspace basic-example-app storybook",
     "test": "yarn lint && testem ci && yarn test:babel-plugins",
-    "test:babel-plugins": "mocha -r esm --timeout 5000 packages/@glimmerx/babel-plugin-component-templates/test packages/@glimmerx/eslint-plugin/test/lib/rules",
+    "test:babel-plugins": "mocha -r esm --timeout 5000 packages/@glimmerx/babel-preset/test packages/@glimmerx/eslint-plugin/test/lib/rules",
     "test:ember": "yarn workspace basic-addon ember try:one",
     "test:playground": "yarn workspace glimmerx-playground test",
     "test:watch": "testem"
@@ -44,10 +44,9 @@
     "@babel/plugin-proposal-decorators": "^7.8.3",
     "@babel/preset-env": "^7.9.5",
     "@babel/preset-typescript": "^7.9.0",
-    "@glimmer/babel-plugin-glimmer-env": "2.0.0-beta.12",
     "@types/qunit": "^2.9.1",
-    "@typescript-eslint/eslint-plugin": "^2.27.0",
-    "@typescript-eslint/parser": "^2.27.0",
+    "@typescript-eslint/eslint-plugin": "^4.18.0",
+    "@typescript-eslint/parser": "^4.18.0",
     "babel-loader": "^8.0.6",
     "eslint": "^6.8.0",
     "eslint-config-prettier": "^6.10.1",
@@ -62,7 +61,7 @@
     "testem": "^3.0.3",
     "ts-loader": "^6.2.2",
     "tsconfig-paths-webpack-plugin": "^3.2.0",
-    "typescript": "~3.8.3",
+    "typescript": "~4.2.3",
     "webpack": "^4.42.1",
     "webpack-cli": "^3.3.11",
     "webpack-dev-server": "^3.10.3"