[chore] Compile packages for es2020 instead of es5

Author: React-Admin CI

.gitignore

@@ -27,3 +27,4 @@ cypress/downloads
 .env
 .claude/settings.local.json
 .npmrc
+/packs

Makefile

@@ -190,3 +190,6 @@ check-documentation-videos-format: ## Check the documentation format
 
 release: ## Start the release process and publish the packages to npm using lerna
 	./scripts/release.sh
+
+pack: ## Create NPM packages for all publishable packages in ./packs
+	yarn workspaces foreach -A --no-private pack --out ../../packs/%s-%v.tar.gz

docs_headless/package.json

@@ -1,5 +1,6 @@
 {
     "name": "ra-core-doc",
+    "private": true,
     "type": "module",
     "version": "0.0.1",
     "scripts": {

tsconfig.json

@@ -5,13 +5,13 @@
         "module": "commonjs" /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */,
         "lib": [
             "es2017",
-            "dom"
+            "dom",
         ] /* Specify library files to be included in the compilation. */,
         "allowJs": true /* Allow javascript files to be compiled. */,
         // "checkJs": true,                       /* Report errors in .js files. */
         "jsx": "react" /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */,
         "declaration": true /* Generates corresponding '.d.ts' file. */,
-        "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
+        "declarationMap": true /* Generates a sourcemap for each corresponding '.d.ts' file. */,
         "sourceMap": true /* Generates corresponding '.map' file. */,
         // "outFile": "./",                       /* Concatenate and emit output to single file. */
         // "outDir": "./lib",                        /* Redirect output structure to the directory. */
@@ -59,8 +59,8 @@
         // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
         // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
         "skipLibCheck": true,
-        "erasableSyntaxOnly": true
-    }
+        "erasableSyntaxOnly": true,
+    },
     // "references": [
     //     { "path": "./packages/ra-core" },
     //     { "path": "./packages/ra-data-fakerest" },