Update Prototype.js to 1.7.3

[Bitaru]

Summary (*)

Currently Magento uses Prototype version 1.7.0.0, which contains bugs in Array.toArray and Array.entries. Those bugs makes impossible to use some babel polyfills in 3rd-party apps.

Examples (*)

This polyfill always fails on version 1.7.0.0 and works with 1.7.3

// `Array.prototype.map` method
// https://tc39.github.io/ecma262/#sec-array.prototype.map
// with adding support of @@species
$({ target: 'Array', proto: true, forced: !arrayMethodHasSpeciesSupport('map') }, {
  map: function map(callbackfn /* , thisArg */) {
    return $map(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
  }
});

Proposed solution

Update Prototype.js to 1.7.3

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• Severity: S0 - Affects critical data or functionality and leaves users with no workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

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[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed after 14 days if no further activity occurs. Thank you for your contributions.