Protect hook transforms array results incorrectly.

[sechel]

Steps to reproduce

Create a custom service and return an array of arrays, from the find method:

async find(params?: Params): Promise<number[][]> {
   return [
    [ 1, 2, 3, 4 ]
   ];
}

Add a protect hook from the @feathersjs/authentication-local package as after-hook to the global app hooks. Protect any field.

  after: {
    all: [
      protect('field')
    ],
    find: [],
    get: [],
    create: [],
    update: [],
    patch: [],
    remove: []
  }

The result will be

[
 { 0: 1, 1: 2, 2: 3, 3: 4 } 
]

The source of this problem lies in these lines of the protect hook:

feathers/packages/authentication-local/src/hooks/protect.ts

Lines 6 to 10 in 6de92b1

	const o = (current: any) => {
	const data = typeof current.toJSON === 'function'
	? current.toJSON() : current;
	return omit(data, fields);
	};

Here you invoke _.omit on an array which leads to this result.

[sechel]

Thanks 👍