migrate to node20, add nvm & direnv, update deps #18

	name: Build and Test
	on: [ push, pull_request ]
	jobs:
	run:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Setup node
	uses: actions/setup-node@v2
	with:
	node-version: 18.18

	- name: Install dependencies
	run: yarn

	- name: Build
	run: yarn build

	- name: Install codecov
	run: npm install -g codecov

	- name: Run tests and collect coverage
	run: yarn coverage

	- name: Upload coverage reports to Codecov
	uses: codecov/[email protected]
	with:
	token: ${{ secrets.CODECOV_TOKEN }}
	slug: l00k/serialzr

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