test: use `T.TempDir` to create temporary test directory

ref(tests): remove monkey patching setup

fix(tests): fix cleaning up temp files

ref!: change the default behaviour not to drop

ci: fix Makefile

ref: upgrade to go 1.18

ci: replace travis setup with github actions

remove once and use a flag to start the goroutine.

Update issue templates

Create PULL_REQUEST_TEMPLATE.md

Create CONTRIBUTING.md

Create CODE_OF_CONDUCT.md

remove /dev/stdin from printing when restuls are piped

support go 1.7 by removing SliceStable (closes #6)

refactor Read and WriteTo methods (closes #4)