Element.getAttributeNames()

https://developer.mozilla.org/en-US/docs/Web/API/Element/getAttributeNames#Polyfill

5.19.0

Bump lodash.merge from 4.6.1 to 4.6.2

Bumps [lodash.merge](https://github.com/lodash/lodash) from 4.6.1 to 4.6.2.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](https://github.com/lodash/lodash/commits)

Signed-off-by: dependabot[bot] <support@github.com>

Object.keys polyfill

Added Object.keys polyfill.

update MouseEvent polyfill

The MDN version of MouseEvent polyfill has changed. This release updates the polyfill to match its MDN version.

Array.prototype.reduce

Added

• Array.prototype.reduce

Change publishing strategy

Since now, the mdn-polyfills.tgz contains only the bundled polyfills.

Update Element.prototype.closest

Update Element.prototype.closest has been updated to match the newest MDN version.

Fix Element.prototype.classList

Fix Element.prototype.classList. Based on the newest polyfill version from MDN https://developer.mozilla.org/en-US/docs/Web/API/Element/classList$compare?from=1529567&to=1542773&utm_campaign=Wiki+Doc+Edits&utm_medium=email&utm_source=developer.mozilla.org

Node.prototype.firstElementChild

Node.prototype.firstElementChild

classList fix for IE9

5.15.1

increase classList size