Update dependencies and improve build process (#11)

 * Update flame_lint to 0.2.0 (to fix deprecated option warning + more rules)
 * Bump other packages (mason, dartdoc)
 * Update build script to use mason from pubspec instead of requiring global mason_cli
 * Use newer mason to re-generate the binary files (should be no-op, just different format)
 * Support old versions of flame implicitly (before you HAD to pick last 3, now we show last 5 but you can pick any)

lib/commands/create_command.dart

@@ -43,8 +43,9 @@ Future<void> createCommand(ArgResults command) async {
     interactive,
     'flame-version',
     'Which Flame version do you wish to use?',
-    flameVersions.versions.associateWith((e) => e),
+    flameVersions.visible.associateWith((e) => e),
     defaultsTo: flameVersions.versions.first,
+    fullOptions: flameVersions.versions.associateWith((e) => e),
   );
 
   final extraPackageOptions = FlameVersionManager.singleton.versions.keys

lib/flame_version_manager.dart

@@ -67,11 +67,14 @@ enum Package {
 
 class Versions {
   final List<String> versions;
+
   String get main => versions.first;
+  List<String> get visible => versions.take(5).toList();
+
   const Versions(this.versions);
 
   factory Versions.parse(List<Map<String, dynamic>> json) {
     final versions = json.map((e) => e['version'] as String).toList().reversed;
-    return Versions(versions.take(3).toList());
+    return Versions(versions.toList());
   }
 }