1.2.1

Changes since the last release:

• Return a non-zero exit code on errors
• Print error output when font was not found
• Check getopt(1) version, fix usage note on misuse, closes: #1
• Correctly handle fonts wo/separate postscript name, closes: #2
• Reformat --help output to term width using fmt(1)
• Static analysis with ShellCheck, fixed multiple issues