Switch to selectlist fork with nonce support

[cjdenio]

I forked selectlist-polyfill to support CSP nonces (https://github.com/cjdenio/selectlist-polyfill) and confirmed it fixes the original issue. Also happy to transfer this repo to the Obl.ong GitHub org!

Resolves #138

[reesericci]

This PR doesn't appear to send the nonce to the selectlist polyfill - how does it fetch the nonce?

[cjdenio]

Rails automatically adds a csp-nonce meta tag to the page header— it just reads from that

[reesericci]

Is the csp-nonce tag a standard thing a polyfill should rely on existing?

[cjdenio]

It's a standard for all Rails apps, which this fork is really only designed to work with. There's no cross-framework way for JS packages to access the nonce, if that's what you mean

[reesericci]

Alright cool, can you transfer that repo to obl-ong as well? LGTM!