add example for categorical feature usage (#76) #122

	# This workflow will build a Java project with Maven
	# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven

	name: Java CI with Maven

	on:
	push:
	branches: [ main ]
	pull_request:
	branches: [ main ]

	jobs:
	build:
	runs-on: ${{ matrix.platform }}
	strategy:
	matrix:
	java: [11, 17, 21]
	platform: [ubuntu-20.04, macos-11, windows-2019]
	steps:
	- name: install libomp
	run: brew install libomp
	if: runner.os == 'macOS'
	- uses: actions/checkout@v2
	with:
	lfs: true
	- name: Checkout LFS objects
	run: git lfs checkout
	- name: Set up JDK
	uses: actions/setup-java@v1
	with:
	java-version: ${{ matrix.java }}

	- name: Cache maven packages
	uses: actions/cache@v2
	env:
	cache-name: cache-mvn
	with:
	path: ~/.m2
	key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/pom.xml') }}
	restore-keys: \|
	${{ runner.os }}-build-${{ env.cache-name }}-
	${{ runner.os }}-build-
	${{ runner.os }}-
	- name: Build with Maven
	run: mvn -B compile --file pom.xml
	- name: Run tests
	run: mvn -B test --file pom.xml

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