Promise-based asynchronous resource pool allowing shared resource proxies.
Extends shaunc/async-pool.
npm install async-proxy-pool
In addition to AsyncPool.use() there is a AsyncProxyPool.share() which gets a proxy to a resource, and issues
method calls on onresources when they are available. This can be useful if you want to pass around a resource, like
a database connection, without depleting the supply, and you don't care about serializing your method calls.