Updates isDateString() regular expression to add escape for digit (#69)

* Updates isDateString() regular expression to add escape for digit

* Prettier updates

Author: mcheale-parkit

__tests__/defaultConverters.test.ts

@@ -220,7 +220,8 @@ describe('defaultConverters', () => {
 
           isBooleanString: { type: 'string', enum: ['true', 'false'] },
           isDateString: {
-            pattern: 'd{4}-[01]d-[0-3]dT[0-2]d:[0-5]d:[0-5]d.d+Z?',
+            pattern:
+              '\\d{4}-[01]\\d-[0-3]\\dT[0-2]\\d:[0-5]\\d:[0-5]\\d.\\d+Z?',
             type: 'string',
           },
           isNumberString: { pattern: '^[-+]?[0-9]+$', type: 'string' },

src/defaultConverters.ts

@@ -107,7 +107,7 @@ export const defaultConverters: ISchemaConverters = {
     type: 'string',
   },
   [cv.IS_DATE_STRING]: {
-    pattern: 'd{4}-[01]d-[0-3]dT[0-2]d:[0-5]d:[0-5]d.d+Z?',
+    pattern: '\\d{4}-[01]\\d-[0-3]\\dT[0-2]\\d:[0-5]\\d:[0-5]\\d.\\d+Z?',
     type: 'string',
   },
   [cv.IS_ARRAY]: {