added example

Author: matthewnitschke

README.md

@@ -13,7 +13,7 @@ import 'package:pubspec_lock_parse/pubspec_lock_parse.dart';
 
 void main() {
     final lockStr = File('path/to/pubspec.lock').readAsStringSync();
-    final lockfile = PubspecLock.parse(lockStr)
+    final lockfile = PubspecLock.parse(lockStr);
 }
 ```
 

example/main.dart

@@ -0,0 +1,14 @@
+import 'dart:io';
+
+import 'package:pubspec_lock_parse/pubspec_lock_parse.dart';
+
+void main() {
+  // read the pubspec lock of this package (might require calling pub get to generate)
+  final lockStr = File('../pubspec.lock').readAsStringSync();
+  final lockfile = PubspecLock.parse(lockStr);
+
+  print('Dependencies found in lockfile:');
+  for (final packageName in lockfile.packages.keys) {
+    print('  $packageName: ${lockfile.packages[packageName]!.version.toString()}');
+  }
+}