Dealing with empty files

[romainrichard]

Right now hicat doesn't handle empty files correctly while cat does:

$ touch some_file
$ cat some_file 
$ hicat some_file 
/usr/local/lib/node_modules/hicat/index.js:38
  if (!out || !out.value) throw new Error("failed to highlight");
                          ^

Error: failed to highlight
    at hicat (/usr/local/lib/node_modules/hicat/index.js:38:33)
    at /usr/local/lib/node_modules/hicat/bin/hicat:82:20
    at Array.forEach (native)
    at /usr/local/lib/node_modules/hicat/bin/hicat:77:9
    at read (/usr/local/lib/node_modules/hicat/lib/read.js:59:5)
    at Object.<anonymous> (/usr/local/lib/node_modules/hicat/bin/hicat:75:1)
    at Module._compile (module.js:410:26)
    at Object.Module._extensions..js (module.js:417:10)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)

Would be great if this use case could be fixed.