fix build system

[saade]

npm run dev

> dev
> npm-run-all --parallel dev:*


> dev:scripts
> node bin/build.js --dev


> dev:styles
> npx tailwindcss -i resources/css/index.css -o resources/dist/filament-tree.css --postcss --watch

Build started at 2:43:32 PM: ./resources/dist/filament-tree.js
Build finished at 2:43:32 PM: ./resources/dist/filament-tree.js
(node:56919) UnhandledPromiseRejectionWarning: ReferenceError: module is not defined in ES module scope
This file is being treated as an ES module because it has a '.js' file extension and '/Users/saade/GovDigital/govdigital/packages/filament-tree/package.json' contains "type": "module". To treat it as a CommonJS script, rename it to use the '.cjs' file extension.
    at file:///Users/saade/GovDigital/govdigital/packages/filament-tree/postcss.config.js:1:1
    at ModuleJob.run (internal/modules/esm/module_job.js:183:25)
    at async Loader.import (internal/modules/esm/loader.js:178:24)
    at async importDefault (/Users/saade/GovDigital/govdigital/packages/filament-tree/node_modules/postcss-load-config/src/index.js:71:18)
    at async Object.search (/Users/saade/GovDigital/govdigital/packages/filament-tree/node_modules/lilconfig/dist/index.js:130:37)
    at async loadPostCssPlugins (/Users/saade/GovDigital/govdigital/packages/filament-tree/node_modules/tailwindcss/lib/cli/build/plugin.js:60:12)
    at async createProcessor (/Users/saade/GovDigital/govdigital/packages/filament-tree/node_modules/tailwindcss/lib/cli/build/plugin.js:233:74)
    at async build (/Users/saade/GovDigital/govdigital/packages/filament-tree/node_modules/tailwindcss/lib/cli/build/index.js:39:21)
(Use `node --trace-warnings ...` to show where the warning was created)
(node:56919) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
(node:56919) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

and

npm run dev

> dev
> npm-run-all --parallel dev:*


> dev:styles
> npx tailwindcss -i resources/css/index.css -o resources/dist/filament-tree.css --postcss --watch


> dev:scripts
> node bin/build.js --dev

file:///Users/saade/GovDigital/govdigital/packages/filament-tree/postcss.config.js:1
module.exports = {
^

ReferenceError: module is not defined in ES module scope
This file is being treated as an ES module because it has a '.js' file extension and '/Users/saade/GovDigital/govdigital/packages/filament-tree/package.json' contains "type": "module". To treat it as a CommonJS script, rename it to use the '.cjs' file extension.
    at file:///Users/saade/GovDigital/govdigital/packages/filament-tree/postcss.config.js:1:1
    at ModuleJob.run (node:internal/modules/esm/module_job:194:25)

Node.js v18.17.1
ERROR: "dev:styles" exited with 1.