No TOC returned under OS X

[einfallstoll]

Under OS X no TOC is returned. I tried the current master as well as version 0.4.4 as recommended in issue #15.

This is the output of version 0.4.4:

$ gh-md-toc README.md


Table of Contents
=================

grep: unrecognized option `--null-data'
usage: grep [-abcDEFGHhIiJLlmnOoqRSsUVvwxZ] [-A num] [-B num] [-C[num]]
    [-e pattern] [-f file] [--binary-files=value] [--color=when]
    [--context[=num]] [--directories=action] [--label] [--line-buffered]
    [--null] [pattern] [file ...]

(23) Failed writing body

Created by [gh-md-toc](https://github.com/ekalinin/github-markdown-toc)

The current master has no output at all.

[einfallstoll]

Fixed as suggested in #15 with the golang-version:

cd /usr/local/bin
wget https://github.com/ekalinin/github-markdown-toc.go/releases/download/0.4.1/gh-md-toc.darwin.amd64.tgz
tar -xf gh-md-toc.darwin.amd64.tgz
rm gh-md-toc.darwin.amd64.tgz