React 18.0.0 doesn't really seem to be a requirement

[adamskwersky]

The code seems to run fine with React ^16.14 (using npm 6.x which is lax on peer dependencies)
Can we change the package.json to only require React4 ^16.14 instead of 18 as a peer dependency?
Our product must continue using 16.14 for the time being.

[savolkov]

@MaTeMaTuK please take a look at that, this is a good idea. Here's the PR #184