Iron Fish v1.12.0 has been released!

## Notable Changes
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Removing support for NodeJS v16; adding support for NodeJS v20 and beyond. The node now requires a minimum version of NodeJS v18 instead of _only_ NodeJS v18, so we can more easily support new NodeJS versions as they are released.
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Block syncing speed should be improved. The node will regularly measure the connection of some peers to try to find a faster peer to sync from. The first time this occurs is 2 minutes after the node starts syncing, then 4, 8, 16.. up to a maximum of once per 60 minutes.
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Nodes should be able to find peers faster and more consistently.
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Added a `keepOpenPeerSlot` config option (default false). When set to true, a node will disconnect from a peer if it is at maxPeers, so that the node will always allow an incoming connection instead of reaching the maximum number of peers and rejecting incoming connections.

https://github.com/iron-fish/ironfish/releases/tag/v1.12.0