nargs-eats-options doesn't work with array options

[vadim-galeev]

Firstly, nargs didn't consume dashed arguments since version 9.0.0. So, issue #232 was opened, and new configuration option, nargs-eats-options, was added (thanks to @bcoe).
By now, after the fix, nargs-eats-option works well with one-value options but still doesn't work with options which are considered as arrays.
For example, --foo is an array option (and nargs is set to 1):
--foo -apple --foo banana -foo cat
is not parsed correctly even with nargs-eats-option=true .
Expected result is: foo: [ '-apple', 'banana', 'cat' ].
Actual result is: foo: ['banana', 'cat' ].

And this works correct in version 8.1.0, result is foo: [ '-apple', 'banana', 'cat' ] as expected.

[bcoe]

@vadim-galeev any interest in submitting a patch or failing test?