Fix area calculation for polygons with holes #123

	name: main
	on:
	pull_request:
	push:
	env:
	GOFUMPT_VERSION: 0.6.0
	GOTOOLCHAIN: local
	GOLANGCI_LINT_VERSION: 1.59.1
	jobs:
	linux:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
	- uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32
	with:
	cache: true
	go-version-file: go.mod
	- name: build
	run: go build ./...
	- name: test
	run: go test -race -tags=docker ./...
	- name: Check formatting
	run: \|
	make format
	git diff --exit-code
	- name: Check generate
	run: \|
	make generate
	git diff --exit-code
	darwin:
	runs-on: macos-latest
	steps:
	- uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
	- uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32
	with:
	cache: true
	go-version-file: go.mod
	- name: build
	run: go build ./...
	- name: test
	run: go test -race ./...
	windows:
	runs-on: windows-latest
	steps:
	- uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
	- uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32
	with:
	cache: true
	go-version-file: go.mod
	- name: build
	run: go build ./...
	- name: test
	run: go test -race ./...
	lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332
	- uses: actions/setup-go@0a12ed9d6a96ab950c8f026ed9f722fe0da7ef32
	with:
	cache: true
	go-version-file: go.mod
	- uses: golangci/golangci-lint-action@aaa42aa0628b4ae2578232a66b541047968fac86
	with:
	version: v${{ env.GOLANGCI_LINT_VERSION }}
	- name: format
	run: make format

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