Example, prepare for 1.6.4 (#52)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 129e440..0804f02 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 1.6.4
+
+* Fixed a number of lints that affect the package health score.
+
+* Added an example.
+
 ## 1.6.3
 
 * Don't throw a FileSystemException from `current` if the working directory has
diff --git a/example/example.dart b/example/example.dart
new file mode 100644
index 0000000..89271fd
--- /dev/null
+++ b/example/example.dart
@@ -0,0 +1,16 @@
+// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:path/path.dart' as p;
+
+void main() {
+  print('Current path style: ${p.style}');
+
+  print('Current process path: ${p.current}');
+
+  print('Separators');
+  for (var entry in [p.posix, p.windows, p.url]) {
+    print('  ${entry.style.toString().padRight(7)}: ${entry.separator}');
+  }
+}
diff --git a/pubspec.yaml b/pubspec.yaml
index 1b5426d..918c4fe 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: path
-version: 1.6.3
+version: 1.6.4
 
 description: >-
   A string-based path manipulation library. All of the path operations you know