Incomplete precisNormalization handling (accents/diacritics)

[vanbroup]

The precisNormalization is not handeling all accents/diacritics, for example:

	"AD": {
		complete: false,
		regions: map[string]bool{
			"ANDORRA LA VELLA":    true,
			"ANDORRA VELLA":       true,
			"CANILLO":             true,
			"ENCAMP":              true,
			"ESCALDES ENGORDANY":  true,
			"LA MASSANA":          true,
			"MASSANA":             true,
			"ORDINO":              true,
			"SANT JULIÀ DE LÒRIA": true,
			"SANT JULIÀ LÒRIA":    true,
		},
	},

Should also include the values with the accents/diacritics replaced:

	"AD": {
		complete: false,
		regions: map[string]bool{
			"ANDORRA LA VELLA":    true,
			"ANDORRA VELLA":       true,
			"CANILLO":             true,
			"ENCAMP":              true,
			"ESCALDES ENGORDANY":  true,
			"LA MASSANA":          true,
			"MASSANA":             true,
			"ORDINO":              true,
			"SANT JULIA DE LORIA": true,
			"SANT JULIÀ DE LÒRIA": true,
			"SANT JULIA LORIA":    true,
			"SANT JULIÀ LÒRIA":    true,
		},
	},

https://github.com/pkic/regions/blob/main/check/regions_map.go#L20