fix: handle date being invalid

src/items/date.ts

@@ -8,7 +8,19 @@ export default class SchemaDate extends SchemaItem<Date> {
 		switch (format) {
 			case 'yy-mm-dd':
 			case 'iso8601': {
-				this.addPreProcess((it) => typeof it === 'string' ? new Date(it) : it)
+				this.addPreProcess((it) => {
+					if (typeof it !== 'string') {
+						return it
+					}
+
+					const date = new Date(it)
+
+					if (isNaN(date.getDate())) {
+						return it
+					}
+
+					return date
+				})
 				break
 			}
 			case 'jj/mm/yy': {
@@ -21,7 +33,12 @@ export default class SchemaDate extends SchemaItem<Date> {
 						return input
 					}
 
-					return new Date(splitted[2], splitted[1] - 1, splitted[0])
+					const date = new Date(splitted[2], splitted[1] - 1, splitted[0])
+					if (isNaN(date.getDate())) {
+						return input
+					}
+
+					return date
 				})
 			}
 		}