faker.name lastName and middleName doesn't work correctly with gender selection

[Shinigami92]

Describe the bug

When using faker.name.lastName or faker.name.middleName with a specific gender, it returns invalid behavior.
It will return female names for male names.

Reproduction

faker.locale = 'uk';

const name = faker.name.middleName(0);
expect(faker.definitions.name.male_middle_name).toContain(name); // returns a female name

Additional Info

faker/src/name.ts

Lines 63 to 125 in 730ca6a

	/**
	* lastName
	*
	* @method lastName
	* @param gender
	* @memberof faker.name
	*/
	lastName(gender?: string | number): string {
	if (
	typeof this.faker.definitions.name.male_last_name !== 'undefined' &&
	typeof this.faker.definitions.name.female_last_name !== 'undefined'
	) {
	// some locale datasets ( like ru ) have last_name split by gender. i have no idea how last names can have genders, but also i do not speak russian
	// see above comment of firstName method
	if (typeof gender !== 'number') {
	gender = this.faker.datatype.number(1);
	}
	if (gender === 0) {
	return this.faker.random.arrayElement(
	this.faker.locales[this.faker.locale].name.male_last_name
	);
	} else {
	return this.faker.random.arrayElement(
	this.faker.locales[this.faker.locale].name.female_last_name
	);
	}
	}
	return this.faker.random.arrayElement(
	this.faker.definitions.name.last_name
	);
	}
	/**
	* middleName
	*
	* @method middleName
	* @param gender
	* @memberof faker.name
	*/
	middleName(gender?: string | number): string {
	if (
	typeof this.faker.definitions.name.male_middle_name !== 'undefined' &&
	typeof this.faker.definitions.name.female_middle_name !== 'undefined'
	) {
	if (typeof gender !== 'number') {
	gender = this.faker.datatype.number(1);
	}
	if (gender === 0) {
	return this.faker.random.arrayElement(
	this.faker.locales[this.faker.locale].name.male_middle_name
	);
	} else {
	return this.faker.random.arrayElement(
	this.faker.locales[this.faker.locale].name.female_middle_name
	);
	}
	}
	return this.faker.random.arrayElement(
	this.faker.definitions.name.middle_name
	);
	}

[wael-fadlallah]

In Arabic Locale there are also a strange behavior

const faker = require("./faker/dist/cjs/locale/ar");

console.log(faker.name.middleName()); // return letters a, b, c ...etc

[wael-fadlallah]

It seems the same behavior exists in English

[ganeshbudhathoki]

fix for default (en) locale, locale (uk) is working as expected.
PR: #440