Download emojis on demand for emoji hash fn

[felicio]

          My only concern (as always) is including the dictionary in the main bundle.

I don't think the concern should block this. But alternative solutions would be:

1. Using a public CDN (example)
2. Download it on demand (example)

Originally posted by @prichodko in https://github.com/status-im/status-web/pull/343#pullrequestreview-1307244287