Add 2D axis-aligned bounding box type #79

	name: Alpine GCC Build

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	build:

	runs-on: ubuntu-latest
	container:
	image: alpine:latest

	steps:
	- uses: actions/checkout@v2
	- name: set up environment
	run: \|
	apk add gcc musl-dev gobject-introspection gtk-doc glib py3-wheel py3-setuptools ninja py3-pip
	pip install meson==0.55.3

	- name: default build
	run: \|
	meson setup --werror --fatal-meson-warnings _build_default
	meson compile -C _build_default
	meson test -C _build_default -v

	- name: gcc-vector build
	run: \|
	meson setup -Dsse2=false -Darm_neon=false -Dgcc_vector=true --werror --fatal-meson-warnings _build_gcc
	meson compile -C _build_gcc
	meson test -C _build_gcc -v

	- name: scalar build
	run: \|
	meson setup -Dsse2=false -Darm_neon=false -Dgcc_vector=false --werror --fatal-meson-warnings _build_scalar
	meson compile -C _build_scalar

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