fix: clippy lint on let Some

bump to 0.3.9+9.0.21

refactor: Replace bincode with postcard

Merge pull request #97 from mcronce/main

Cargo.toml: Update `strum` to 0.27

Merge pull request #93 from whisperfish/fix/parse-national-prefix-with-zero

Merge pull request #95 from whisperfish/fix/viable-phone-number

fix: check if phone number is viable while parsing

fix: correct phone number validation logic

fix: use const for NSN length in parse function

refactor: split and cleanup parser tests

fixup! refactor: validity test suite with rstest

refactor: validity test suite with rstest

refactor: metadata from stripped number

refactor: impl FromStr for NationalNumber