v0.1.0 - Generate Key Pair and Signatures

What's Changed

• Unencrypted keys by @jshawl in #6
• test against ruby 3.3 by @jshawl in #7
• add comment param to PrivateKey.sign by @jshawl in #8
• check the checksum by @jshawl in #9
• standardize blake2b implementation by @jshawl in #10
• write private key by @jshawl in #12
• generate key pair by @jshawl in #11
• Public key to_s by @jshawl in #13
• support public key from string or from file by @jshawl in #14
• signature.to_s by @jshawl in #15
• move jesdict1 tests out of shell by @jshawl in #17
• document key pair generation by @jshawl in #16
• recreate public key from private key by @jshawl in #18
• Refactor private key by @jshawl in #19
• Refactor public key by @jshawl in #20

Full Changelog: v0.0.8...v0.1.0