Added Unfocuser and json converters

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

lib/arcane_helper_utils.dart

@@ -3,4 +3,6 @@ library arcane_helper_utils;
 export "package:arcane_helper_utils/src/extensions/date_time.dart";
 export "package:arcane_helper_utils/src/extensions/string.dart";
 export "package:arcane_helper_utils/src/extensions/string_jwt.dart";
+export "package:arcane_helper_utils/src/utils/json_converter.dart";
 export "package:arcane_helper_utils/src/utils/ticker.dart";
+export "package:arcane_helper_utils/src/widgets/unfocuser.dart";

lib/src/widgets/unfocuser.dart

@@ -0,0 +1,55 @@
+/*
+(c) Copyright 2020 Serov Konstantin.
+
+Licensed under the MIT license:
+
+    http://www.opensource.org/licenses/mit-license.php
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+import "package:flutter/material.dart";
+
+class Unfocuser extends StatelessWidget {
+  const Unfocuser({
+    required this.child,
+    super.key,
+    this.isEnabled = true,
+  });
+
+  final Widget child;
+  final bool isEnabled;
+
+  @override
+  Widget build(BuildContext context) {
+    if (!isEnabled) {
+      return child;
+    }
+    return GestureDetector(
+      onTap: () {
+        final focusScopeNode = FocusScope.of(context);
+        if (focusScopeNode.hasPrimaryFocus == false &&
+            focusScopeNode.focusedChild != null) {
+          FocusManager.instance.primaryFocus?.unfocus();
+        }
+      },
+      child: child,
+    );
+  }
+}