* gitignore *.html for test coverage reports
* fix typos
* Increase hashcompute.go test coverage to 100 percent
* Add new Go versions. Upgrade GitHub Actions.
* Add tests for missing ext hashes
* Add test for hashing non-hexadecimal string
* Add tests for loading empty bytes buffer
* Run go fmt
* Fix comments
* Fix comments
* Fix spelling
* fix actions versions
* Upgrade to actions/setup-go@v4
* Add minimum Go version for go.mod
