Add unit_time_delta to make time_delta_to_n_steps make sense #443

	# Workflow derived from https://github.com/r-lib/actions/tree/v2/examples
	# Need help debugging build failures? Start at https://github.com/r-lib/actions#where-to-find-help
	#
	# Modifications:
	# - devtools::build_readme()
	# - workflow_dispatch added to allow manual triggering of the workflow
	# - trigger branches changed
	# - API key secrets.DELPHI_GITHUB_ACTIONS_EPIDATA_API_KEY
	on:
	push:
	paths: ["R/**", "README.Rmd"]
	workflow_dispatch:

	name: Document

	jobs:
	document:
	runs-on: ubuntu-latest
	env:
	GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
	DELPHI_EPIDATA_KEY: ${{ secrets.DELPHI_GITHUB_ACTIONS_EPIDATA_API_KEY }}
	steps:
	- name: Checkout repo
	uses: actions/checkout@v3
	with:
	fetch-depth: 0

	- name: Setup R
	uses: r-lib/actions/setup-r@v2
	with:
	use-public-rspm: true

	- name: Install dependencies
	uses: r-lib/actions/setup-r-dependencies@v2
	with:
	extra-packages: \|
	any::devtools
	any::roxygen2
	needs: \|
	devtools
	roxygen2

	- name: Document
	run: roxygen2::roxygenise()
	shell: Rscript {0}

	- name: Build README.md from README.Rmd
	run: Rscript -e 'if (file.exists("README.Rmd")) devtools::build_readme()'

	- name: Commit and push changes
	run: \|
	git config --local user.name "$GITHUB_ACTOR"
	git config --local user.email "[email protected]"
	git add README.md
	git add man/\* NAMESPACE DESCRIPTION
	git commit -m "docs: document (GHA)" \|\| echo "No changes to commit"
	git pull --rebase
	git push origin

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