ICU-21757 Bring in CollectionUtilities, depend only on icu4j #1931

	# This workflow will install and run the flake8 linter on the project's Python files,
	# then run the tabcheck script (checks Java files for tab characters).

	name: Python-based Checks

	on:
	push:
	branches: [ '*' ]
	pull_request:
	branches: [ '*' ]

	jobs:
	build:

	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [3.8]

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v1
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install flake8
	- name: Lint Python files with flake8
	run: \|
	flake8
	- name: Check .java files for tabs
	run: \|
	python py/tabcheck.py

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