bump version (#15)

diff --git a/pubspec.yaml b/pubspec.yaml
index a6fd399..faa69b8 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: ffi
-version: 0.1.3-dev.2
+version: 0.1.3-dev.3
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/ffi
 description: Utilities for working with Foreign Function Interface (FFI) code.