Add warning for RGBX files and clarify RGBA warning #31

	name: Build
	on: [push]
	jobs:
	Run-Tests:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.8", "3.9", "3.10", "3.11"]
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v3
	with:
	python-version: '${{ matrix.python-version }}'
	- name: Install apt dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install exiftool libstdc++6
	- name: Install python dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r requirements.txt
	- name: Run pytest
	run: pytest

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