Upgraded to xwidgets 0.28.1 and build with cpp17 #60

	name: Tests

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	defaults:
	run:
	shell: bash -l {0}

	jobs:
	run:
	runs-on: ${{ matrix.os }}

	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-latest]

	steps:
	- name: Get number of CPU cores
	uses: SimenB/github-actions-cpu-cores@v1

	- uses: actions/checkout@v2

	- name: Setup mamba
	uses: mamba-org/provision-with-micromamba@main
	with:
	environment-file: environment-dev.yml

	- name: Install xcanvas
	run: \|
	mkdir build
	cd build
	cmake .. \
	-D CMAKE_PREFIX_PATH=$CONDA_PREFIX \
	-D CMAKE_INSTALL_PREFIX=$CONDA_PREFIX \
	-D CMAKE_INSTALL_LIBDIR=lib \
	-D CMAKE_C_COMPILER=$CC \
	-D CMAKE_CXX_COMPILER=$CXX
	make install -j ${{ steps.cpu-cores.outputs.count }}

	# TODO: enable this agian when xeus-cpp is available
	# - name: Run tests
	# run: pytest .

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