add /testing entry point

Author: TheSonOfThomp

packages/select/package.json

@@ -2,14 +2,16 @@
   "name": "@leafygreen-ui/select",
   "version": "14.1.5",
   "description": "leafyGreen UI Kit Select",
-  "main": "./dist/index.js",
-  "module": "./dist/esm/index.js",
-  "types": "./dist/index.d.ts",
-  "typesVersions": {
-    "<3.9": {
-      "*": [
-        "ts3.4/*"
-      ]
+  "exports": {
+    ".": {
+      "import": "./dist/esm/index.js",
+      "require": "./dist/index.js",
+      "types": "./dist/index.d.ts"
+    },
+    "testing": {
+      "import": "./dist/esm/testing/index.js",
+      "require": "./dist/testing/index.js",
+      "types": "./dist/testing/index.d.ts"
     }
   },
   "scripts": {

packages/select/rollup.config.mjs

@@ -0,0 +1,30 @@
+import {
+  esmConfig,
+  umdConfig,
+  storiesConfig,
+} from '@lg-tools/build/config/rollup.config.mjs';
+
+const esmTestUtilsConfig = {
+  ...esmConfig,
+  input: 'src/testing/index.ts',
+  output: {
+    ...esmConfig.output,
+    dir: 'dist/esm/testing',
+  },
+};
+const umdTestUtilsConfig = {
+  ...umdConfig,
+  input: 'src/testing/index.ts',
+  output: {
+    ...umdConfig.output,
+    dir: 'dist/testing',
+  },
+};
+
+export default [
+  esmConfig,
+  umdConfig,
+  esmTestUtilsConfig,
+  umdTestUtilsConfig,
+  storiesConfig,
+];