Removed patchValue in favor of didChange. (#552)

* Removed patchValue in favor of didChange.

Author: awhitford

lib/src/fields/form_builder_text_field.dart

@@ -481,13 +481,6 @@ class _FormBuilderTextFieldState
     });
   }
 
-  @override
-  void patchValue(String val) {
-    _effectiveController.text = val;
-    _effectiveController.selection =
-        TextSelection.collapsed(offset: val?.length ?? -1);
-  }
-
   @override
   void didChange(String value) {
     super.didChange(value);

lib/src/form_builder.dart

@@ -135,7 +135,7 @@ class FormBuilderState extends State<FormBuilder> {
 
   void patchValue(Map<String, dynamic> val) {
     val.forEach((key, dynamic value) {
-      _fields[key]?.patchValue(value);
+      _fields[key]?.didChange(value);
     });
   }
 

lib/src/form_builder_field.dart

@@ -170,10 +170,6 @@ abstract class FormBuilderFieldState<F extends FormBuilderField<T>, T>
     FocusScope.of(context).requestFocus(effectiveFocusNode);
   }
 
-  void patchValue(T value) {
-    didChange(value);
-  }
-
   InputDecoration decoration() => widget.decoration.copyWith(
         errorText: widget.decoration?.errorText ?? errorText,
       );