fix: support sequential CallExpressions in member chains

[chrisvoll]

fixes #2832

This PR fixes the formatting for this input:

Input:

wrapper.find('SomewhatLongNodeName').prop('longPropFunctionName')().then(function() {
  doSomething();
});

Before:

wrapper
  .find("SomewhatLongNodeName")
  .prop("longPropFunctionName")().then(function() {
  doSomething();
});

After:

wrapper
  .find("SomewhatLongNodeName")
  .prop("longPropFunctionName")()
  .then(function() {
    doSomething();
  });

This is my first PR for Prettier, so I'm more than happy to make any adjustments as needed. Thanks!

[azz]

Looks great. Could we add one or two tests for when the second function call has arguments?

[chrisvoll]

@azz will do, thanks for reviewing!

[azz]

Thanks!