fix: Use rollup and fix define module issues

[timgl]

Changes

In progress. Only thing missing is minification of dist/array.js which I couldn't figure out with rollup

• Use rollup for array.js
• Set a specific module name for define to fix array.js uses a "define" that conflicts w/ (Adobe Commerce) Magento's requirejs #433

Checklist

• Tests for new code (see advice on the tests we use)
• Accounted for the impact of any changes across different browsers

[mariusandra]

I fixed what was broken and changed the export type to iife, short for Immediately Invoked Function Execution. This made everything simpler. All the array code code is now executed in a enclosed function/scope, letting it handle injecting itself onto window, as it's doing anyway.

There's no possible conflict with a global define anymore, as everything is locally scoped.

We went down some bytes in size as well! 114k -> 79k, a 30% reduction!

# before
-rw-r--r--  1 marius  staff   114K Aug 16 10:55 array.js
-rw-r--r--  1 marius  staff   421K Aug 16 10:55 array.js.map

# after
-rw-r--r--  1 marius  staff    79K Aug 16 10:49 array.js
-rw-r--r--  1 marius  staff   409K Aug 16 10:49 array.js.map

[benjackwhite]

All looks sensible to me!

[timgl]

Nice! Do you feel confident releasing this as is, or should we do some testing somehow?

[mariusandra]

Just to be sure, I built, published and tested the new array.js locally on kea-docs, and everything worked. Events came in, sessions got recorded. The github test with IE11 even passes. Thus yep, let's release and get it on cloud for further testing.