Add Auto field to search bar

lib/components/search_bar.dart

@@ -4,6 +4,7 @@ import 'package:flutter/material.dart';
 
 class _LanguageOption extends StatelessWidget {
   final String _language;
+  final Color _color;
 
   @override
   Widget build(BuildContext context) {
@@ -16,12 +17,13 @@ class _LanguageOption extends StatelessWidget {
             color: Colors.black,
             width: 1.0,
           ),
+          color: _color
         ),
       ),
     );
   }
 
-  _LanguageOption(this._language);
+  _LanguageOption(this._language, this._color);
 }
 
 class SearchBar extends StatelessWidget {
@@ -45,8 +47,9 @@ class SearchBar extends StatelessWidget {
           ),
           Row(
             children: [
-              _LanguageOption('English'),
-              _LanguageOption('Japanese'),
+              _LanguageOption('Auto', Colors.white), 
+              _LanguageOption('English', Colors.white),
+              _LanguageOption('Japanese', Colors.blue),
             ],
           ),
         ],

pubspec.lock

@@ -22,13 +22,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.0"
-  characters:
-    dependency: transitive
-    description:
-      name: characters
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.0"
   charcode:
     dependency: transitive
     description:
@@ -49,7 +42,7 @@ packages:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.14.13"
+    version: "1.14.12"
   csslib:
     dependency: transitive
     description:
@@ -134,7 +127,7 @@ packages:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.8"
+    version: "0.12.6"
   meta:
     dependency: transitive
     description:
@@ -237,14 +230,14 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.17"
+    version: "0.2.16"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.1.6"
   unofficial_jisho_api:
     dependency: "direct main"
     description:
@@ -295,5 +288,5 @@ packages:
     source: hosted
     version: "2.0.8"
 sdks:
-  dart: ">=2.9.0-14.0.dev <3.0.0"
+  dart: ">=2.7.0 <3.0.0"
   flutter: ">=1.16.0 <2.0.0"