added a main file for easier module importing

[KhaledElAnsari]

This will make it easier to import the module in project

so instead of

require("semantic-ui-calendar/dist/calendar.js");

it will be

require("semantic-ui-calendar");

though importing CSS will be the same, devs need to write the full relative path

@import "semantic-ui-calendar/dist/calendar.css";

[KhaledElAnsari]

And I updated the npm version in the package.json so it's ready for publishing

[jung-hunsoo]

Simple but good PR, I think.

[KhaledElAnsari]

I hope it get merged to help others

[tchapi]

Any chance this could be merged and published ? This is a quick win

[KhaledElAnsari]

@mdehoog can you please merge it and publish it?