convert .js to .cjs

jest.config.cjs

@@ -0,0 +1,3 @@
+module.exports = {
+  projects: ['<rootDir>/packages/*/jest.config.cjs'],
+}

jest.config.js

@@ -1,3 +0,0 @@
-module.exports = {
-  projects: ['<rootDir>/packages/*/jest.config.js'],
-}

packages/@headlessui-react/jest.config.cjs

@@ -1,3 +1,2 @@
-const create = require('../../jest/create-jest-config.js')
-
+let create = require('../../jest/create-jest-config.cjs')
 module.exports = create(__dirname, { displayName: 'React' })

packages/@headlessui-vue/jest.config.cjs

@@ -1,3 +1,2 @@
-const create = require('../../jest/create-jest-config.js')
-
+let create = require('../../jest/create-jest-config.cjs')
 module.exports = create(__dirname, { displayName: ' Vue ' })