fix: email validation parsing

Author: ivangsa

src/main/antlr4/io.zenwave360.zdl.antlr/Zdl.g4

@@ -208,7 +208,7 @@ field_initialization: EQUALS field_initial_value;
 field_initial_value: simple;
 //field_validations: REQUIRED | UNIQUE | min_validation | max_validation | minlength_validation | maxlength_validation | pattern_validation;
 field_validations: field_validation_name (LPAREN field_validation_value RPAREN)?;
-field_validation_name: REQUIRED | UNIQUE | MIN | MAX | MINLENGTH | MAXLENGTH | PATTERN;
+field_validation_name: REQUIRED | UNIQUE | MIN | MAX | MINLENGTH | MAXLENGTH | PATTERN | EMAIL;
 field_validation_value: INT | ID | PATTERN_REGEX;
 nested_field_validations: nested_field_validation_name (LPAREN nested_field_validation_value RPAREN)?;
 nested_field_validation_name: REQUIRED | UNIQUE | MINLENGTH | MAXLENGTH;

src/test/java/io/zenwave360/zdl/antlr/ZdlListenerTest.java

@@ -122,6 +122,7 @@ public void parseZdl_CompleteZdl() throws Exception {
         assertEquals(true, get(model, "$.entities.CustomerOrder.fields.customerDetails.isComplexType"));
         assertNotNull(get(model, "$.entities.CustomerOrder.fields.customerDetails.options.auditing"));
         assertNotNull(get(model, "$.entities.CustomerOrder.fields.customerDetails.options.ref"));
+        assertNotNull(get(model, "$.entities.Customer.fields.email.validations.email"));
 
         assertEquals("OrderItem", get(model, "$.entities.CustomerOrder.fields.orderItems.type"));
         assertNull(get(model, "$.entities.CustomerOrder.fields.orderItems.initialValue"));

src/test/resources/complete.zdl

@@ -86,7 +86,7 @@ entity CustomerOrder {
       customerId String  required
       firstName String required
       lastName String required
-      email String required
+      email String required email
       phone String required
       avatar byte[]
       address Address {