Middleman support?

[skatkov]

Is your feature request related to a problem? Please describe.
I'd love to use this library with a middleman framework.
https://middlemanapp.com/

Describe the solution you'd like
I've managed to get it running with my existing middleman project, just had to do a little bit more plumbing code.

in config.rb I've added
helpers ApexCharts::Helper
And by explicitly adding apexchart.js library into view.

I don't think that it's possible to make a loader for gem. yeat, maybe we can update README to help offers get started faster?

[styd]

@skatkov, I'm not familiar with middleman. If you don't mind, can you make a pull request for adding middleman in the web support section on README. That would be really helpful for other people using middleman.