built-in bank-card number valid rule

[swift-fs]

func Test_BankCard(t *testing.T) {
	gtest.C(t, func(t *gtest.T) {
		rule := "bank-card"
		val1 := "6230514630000424470"
		val2 := "6230514630000424473"
		// this bocom card  valid result is already true and error is nil
		val3 := "60142870670591508"
		err1 := g.Validator().Data(val1).Rules(rule).Run(ctx)
		err2 := g.Validator().Data(val2).Rules(rule).Run(ctx)
		err3 := g.Validator().Data(val3).Rules(rule).Run(ctx)
		t.AssertNE(err1, nil)
		t.Assert(err2, nil)
		// but no pass
		t.Assert(err3, nil)
	})
}

The bank card number of bocom does not fully follow the luhn algorithm and needs to be optimized and adapted.

[swift-fs]

Currently I have customized the rules to fit older bank card numbers, and this issue can be closed directly.