Add powerpoint loader doc (#2633) #1408

	name: Publish Towhee to TestPyPI
	on:
	push:
	branches:
	- 'main'
	jobs:
	build-n-publish:
	name: Build and Publish Towhee to TestPyPI
	runs-on: ubuntu-18.04
	steps:
	- uses: actions/checkout@master
	- name: Setup Python
	uses: actions/setup-python@v2.3.1
	with:
	python-version: 3.8
	- name: Get history and tags for SCM versioning
	run: \|
	git fetch --prune --unshallow
	git fetch --depth=1 origin +refs/tags/:refs/tags/
	- name: Run Test
	run: \|
	cd tests/testcases
	python3 -m pip install -U pip
	python3 -m pip install --no-cache-dir -r requirements.text
	export TOWHEE_WORKER=True
	python3 -W ignore test_main.py
	- name: Install pypa/build
	run: >-
	python -m
	pip install
	build
	--user
	- name: Build a binary wheel and a source tarball
	run: >-
	python -m
	build
	--sdist
	--wheel
	--outdir dist/
	.
	- name: Publish distribution 📦 to Test PyPI
	uses: pypa/gh-action-pypi-publish@master
	with:
	user: "${{ secrets.TEST_PYPI_USER }}"
	password: "${{ secrets.TEST_PYPI_PASSWORD }}"
	repository_url: https://test.pypi.org/legacy/

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