Support ISO 9362:2022

[boubech]

Currently, the BIC validation checks if the institution code contains only letters.
In the future, the institution code will have numbers. Example : WG11US335AB

jbanking/src/main/java/fr/marcwrobel/jbanking/bic/Bic.java

Lines 190 to 195 in 4c88138

	for (int i = 0; i < INSTITUTION_CODE_INDEX + INSTITUTION_CODE_LENGTH + COUNTRY_CODE_LENGTH; i++) {
	if (!AsciiCharacters.isAlphabetic(bic.charAt(i))) {
	return false;
	}
	}

I think, the library should take in consideration the ISO 9362:2022 describing the BIC.
https://cdn.standards.iteh.ai/samples/84108/21078408ed25469391d0cf6c5d1b6ca9/ISO-9362-2022.pdf