"The same prototype"

[theKashey]

In other words - transfer original class methods into the Proxy prototype, fixes #858

The idea is to leverage a bit side effect caused by React-Hot-Loader's ProxyComponent, to be more concrete - have the same class members list on the top level prototype.
I could not say, that this is super common case, but RHL have to be just a bit more transparent.

https://github.com/uber/react-map-gl/blob/b50de38ab0dfed9e976e1d2e6b0c040629bd82b5/src/utils/autobind.js

export default function autobind(obj) {
  const proto = Object.getPrototypeOf(obj);
  const propNames = Object.getOwnPropertyNames(proto);

  // propNames contains only ProxyComponent methods (render, mount/unmount)
  // should contain methods from base class

  for (const key of propNames) {
    if (typeof obj[key] === 'function') {
      if (!PREDEFINED.find(name => key === name)) {
        obj[key] = obj[key].bind(obj);
      }
    }
  }
}

Related to
visgl/react-map-gl#461

[codecov-io]

Codecov Report

Merging #859 into next will increase coverage by 0.24%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##             next     #859      +/-   ##
==========================================
+ Coverage   86.97%   87.22%   +0.24%     
==========================================
  Files          30       30              
  Lines         622      634      +12     
  Branches      147      149       +2     
==========================================
+ Hits          541      553      +12     
  Misses         65       65              
  Partials       16       16

Impacted Files	Coverage Δ
src/proxy/createClassProxy.js	99.01% <100%> (+0.13%)	⬆️

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[gregberge]

@theKashey conflict

[theKashey]

resolved, just "squash" merge to hide unnecessary commits.