Support latest build_runner and pedantic in dev_dependencies (dart-lang/timing#8)

diff --git a/pkgs/timing/pubspec.yaml b/pkgs/timing/pubspec.yaml
index 3e32757..54d619c 100644
--- a/pkgs/timing/pubspec.yaml
+++ b/pkgs/timing/pubspec.yaml
@@ -1,5 +1,5 @@
 name: timing
-version: 0.1.1
+version: 0.1.2-dev
 description: Timing is a simple package for tracking performance of both async and sync actions
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/timing
@@ -11,7 +11,7 @@
   json_annotation: ^1.0.0
 
 dev_dependencies:
-  build_runner: ^0.10.0
+  build_runner: ^1.0.0
   json_serializable: ^1.0.0
-  pedantic: 1.1.0
+  pedantic: ^1.1.0
   test: ^1.0.0