Add directoryMode option

[ghost]

Adds an option directoryMode which enables controlling permissions of implicitly created directories.

[ghost]

Linting and tests currently fail on main, but this adds no new failures. Running tests manually shows only the same failure as main. The new tests for the added option all pass.

$ ava


  1 test failed

  async › rethrow read after open errors

  /home/user/patch/cp-file/test/async.js:266

   265:   t.is(error.errno, readError.errno, error.message);
   266:   t.is(calledWriteEnd, 1);                          
   267:                                                     

  Difference:

  - 2
  + 1

Type tests also pass.

$ npm run type-test

> cp-file@9.0.0 test
> tsd

[ghost]

Updated this against the notes on the move-file patch.