refactor: remove colors dependency

[vchimev]

#51

[SvetoslavTsenov]

Hey, @vchimev, can you try to fix the dependency. I think it is time to use it in our log for better visualization.
Here is an example of colors:

`
var colors = require('colors');

colors.setTheme({
info: 'blue',
data: 'grey',
help: 'cyan',
warn: 'yellow',
error: 'red'
});

// outputs red text
console.log("this is an error".error);

// outputs yellow text
console.log("this is a warning".warn);`

Basically, we can use red for errors, orange for warning, blue for basic info and etc. It is easy to use in our logs in utils.

[vchimev]

The colors dependency has been removed in #63.

[lock]

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