Bump version to 2.0.7-dev
diff --git a/pubspec.yaml b/pubspec.yaml
index 9b58883..615e017 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: vector_math
-version: 2.0.6
+version: 2.0.7-dev
 author: John McCutchan <john@johnmccutchan.com>
 description: A Vector Math library for 2D and 3D applications.
 homepage: https://github.com/google/vector_math.dart