Add walker options and replace 'find' with the built-in walker #1406

	---
	name: Test fzf on Linux

	on:
	push:
	branches: [ master, devel ]
	pull_request:
	branches: [ master ]
	workflow_dispatch:

	permissions:
	contents: read

	env:
	LANG: C.UTF-8

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	with:
	fetch-depth: 0

	- name: Set up Go
	uses: actions/setup-go@v5
	with:
	go-version: 1.19

	- name: Setup Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: 3.1.0

	- name: Install packages
	run: sudo apt-get install --yes zsh fish tmux

	- name: Install Ruby gems
	run: sudo gem install --no-document minitest:5.17.0 rubocop:1.43.0 rubocop-minitest:0.25.1 rubocop-performance:1.15.2

	- name: Rubocop
	run: rubocop --require rubocop-minitest --require rubocop-performance

	- name: Unit test
	run: make test

	- name: Integration test
	run: make install && ./install --all && tmux new-session -d && ruby test/test_go.rb --verbose

	- name: Integration test (tcell)
	run: TAGS=tcell make clean install && ruby test/test_go.rb --verbose

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