feat: use del() function to ignore the member instead of assigning null #97

	---

	name: CI
	on:
	pull_request:
	push:
	branches:
	- main
	jobs:
	ok:
	runs-on: ubuntu-latest
	if: failure()
	needs:
	- lint
	- test
	steps:
	- run: exit 1
	lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: lint
	uses: reviewdog/action-golangci-lint@v2
	test:
	strategy:
	matrix:
	go_version:
	- stable
	- oldstable
	runs-on: ubuntu-latest
	permissions:
	actions: read
	contents: read
	pull-requests: write
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-go@v5
	with:
	go-version: ${{ matrix.go_version }}
	cache: true
	- name: test
	run: go test -v -race -coverprofile=cover.out -covermode=atomic ./...
	- uses: k1LoW/octocov-action@v1
	if: ${{ matrix.go_version == 'stable' }}
	determine_release:
	runs-on: ubuntu-latest
	if: github.ref == 'refs/heads/main'
	outputs:
	will_release: ${{ steps.determine_release.outputs.new_release_published }}
	steps:
	- uses: actions/checkout@v4
	- id: determine_release
	uses: cycjimmy/semantic-release-action@v4
	with:
	dry_run: true
	continue-on-error: true
	env:
	GITHUB_TOKEN: ${{ github.token }}
	release:
	runs-on: ubuntu-latest
	needs:
	- test
	- lint
	- determine_release
	if: ${{ needs.determine_release.outputs.will_release }}
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- uses: cycjimmy/semantic-release-action@v4
	env:
	GITHUB_TOKEN: ${{ github.token }}
	- uses: actions/setup-go@v5
	with:
	go-version: stable
	cache: true
	- uses: goreleaser/goreleaser-action@v6
	with:
	version: latest
	args: release --rm-dist
	env:
	GITHUB_TOKEN: ${{ github.token }}

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