v0.4.1

Changelog

• cacf692 build: add Makefile
• d6bba95 chore: go mod tidy
• 224bffa chore: move off deprecated io/ioutil pkg funcs
• ca9690c chore: upgrade to yaml v3
• 543e463 fix: handle flag bind error, make linter happy
• 800c167 fix: struct tag formatting
• d072486 ref: simply bool check, make linter happy
• 8406683 style: go fmt