feat(dependency): add Provider library

pubspec.lock

@@ -102,6 +102,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.0"
+  nested:
+    dependency: transitive
+    description:
+      name: nested
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
   path:
     dependency: transitive
     description:
@@ -109,6 +116,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.2"
+  provider:
+    dependency: "direct main"
+    description:
+      name: provider
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.1.2"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -165,3 +179,4 @@ packages:
     version: "2.1.2"
 sdks:
   dart: ">=2.18.2 <3.0.0"
+  flutter: ">=1.16.0"

pubspec.yaml

@@ -36,6 +36,7 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2
+  provider: ^6.1.2
 
 dev_dependencies:
   flutter_test: