Unreachable code in finance.creditCardNumber()

[ST-DDT]

Describe the bug

faker/src/finance.ts

Lines 231 to 261 in d4125e2

	creditCardNumber(provider = ''): string {
	let format: string;
	let formats: string | string[];
	const localeFormat = this.faker.definitions.finance.credit_card;
	if (provider in localeFormat) {
	formats = localeFormat[provider]; // there could be multiple formats
	if (typeof formats === 'string') {
	format = formats;
	} else {
	format = this.faker.random.arrayElement(formats);
	}
	} else if (provider.match(/#/)) {
	// The user chose an optional scheme
	format = provider;
	} else {
	// Choose a random provider
	if (typeof localeFormat === 'string') {
	format = localeFormat;
	} else if (typeof localeFormat === 'object') {
	// Credit cards are in a object structure
	formats = this.faker.random.objectElement(localeFormat, 'value'); // There could be multiple formats
	if (typeof formats === 'string') {
	format = formats;
	} else {
	format = this.faker.random.arrayElement(formats);
	}
	}
	}
	format = format.replace(/\//g, '');
	return this.Helpers.replaceCreditCardSymbols(format);
	}

Due to

faker/src/finance.ts

Line 235 in d4125e2

if (provider in localeFormat) {

localeFormat cannot be a string thus

faker/src/finance.ts

Lines 247 to 248 in d4125e2

	if (typeof localeFormat === 'string') {
	format = localeFormat;

is unreachable

Reproduction

Set the faker.definitions.finance.credit_card to a string and run the method.

Additional Info

Discovered in #363

[xDivisionByZerox]

I would provide a PR for this, Can someone assign me to this?