This closes #1999, fix error on GetCellRichText function when read ce… #1156

	on: [push, pull_request]
	name: build
	jobs:

	test:
	strategy:
	matrix:
	go-version: [1.18.x, 1.19.x, 1.20.x, '>=1.21.1', 1.22.x, 1.23.x]
	os: [ubuntu-latest, macos-13, windows-latest]
	targetplatform: [x86, x64]

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

	steps:

	- name: Install Go
	uses: actions/setup-go@v5
	with:
	go-version: ${{ matrix.go-version }}
	cache: false

	- name: Checkout code
	uses: actions/checkout@v4

	- name: Get dependencies
	run: \|
	env GO111MODULE=on go vet ./...
	- name: Build
	run: go build -v .

	- name: Test
	run: env GO111MODULE=on go test -v -timeout 30m -race ./... -coverprofile='coverage.txt' -covermode=atomic

	- name: Codecov
	uses: codecov/codecov-action@v4
	env:
	CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
	with:
	file: coverage.txt
	flags: unittests
	name: codecov-umbrella

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