Add a 'forEach' snippet

[pbsds]

Requirements

• Filling out the template is required. Any pull request that does not include enough information to be reviewed in a timely manner may be closed at the maintainers' discretion.
• All new code requires tests to ensure against regressions

Description of the Change

It is the simple addition of a single snippet. I did not find tests for these in previously merged commits of the same nature.

Alternate Designs

I could instead use an anonymous function instead of arrow notation, but after a quick check on caniuse.com i decided against it.

Benefits

sanity++

Possible Drawbacks

Not all browsers may support arrow notation

Applicable Issues

[darangi]

@pbsds, This is awesome! ❤️