tinyxxd 1.3.12

• Add Windows suppoort, thanks @kungfubeaner, ref #30
• Add a -t flag, thanks @Kycilak, ref vim@4d262b4
• Add a -h/--help flag use a different exit code, thanks @noahgitsham, ref #33
• Add a tiny performance improvement (setvbuf).
• Some refactoring.
• Make the EBCDIC lookup table static const.
• Update benchmarks.
• Update CI configuration.
• Update documentation.