add lecture (and possibly a workshop) on js asynchronicity

[yevhenorlov]

I'm currently reading Kyle Simpson's Async & Performance (from YDKJS series) and it really highlights the many gaps I previously had (and still have) in understanding the asynchronous side of Javascript. Promise API is simple enough to read one article about and start using straight away, but there's several gotchas that may come as a surprise later.
I feel like maybe there would be a demand for a talk on the topic of promises, how they compare to callback-based APIs, differences between traditional Promise.then syntax and async/await, how event loop works etc.
The scope of this thing will become more clear later, but I would love to try and prepare something.