Add lints as dev_dependencies

pubspec.lock

@@ -508,6 +508,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.2"
+  lints:
+    dependency: "direct dev"
+    description:
+      name: lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
   loading_animations:
     dependency: "direct main"
     description:

pubspec.yaml

@@ -101,6 +101,7 @@ dev_dependencies:
     sdk: flutter
   flutter_launcher_icons: "0.9.0"
   flutter_native_splash: ^1.1.8+4
+  lints: ^1.0.1
 
 flutter_icons:
   android: true