Allow protobuf 0.13.0 (#34)

* Allow protobuf 0.13.0

* Update pubspec.yaml

* Update CHANGELOG.md
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8f36e60..1b018f5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.1.17
+
+* Allow protobuf 0.13.0.
+
 ## 0.1.16
 
 * Update the worker_protocol.pb.dart file with the latest proto generator.
diff --git a/pubspec.yaml b/pubspec.yaml
index 7bb313b..b8c5766 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: bazel_worker
-version: 0.1.16
+version: 0.1.17
 
 description: Tools for creating a bazel persistent worker.
 author: Dart Team <misc@dartlang.org>
@@ -10,7 +10,7 @@
 
 dependencies:
   async: '>1.9.0 <3.0.0'
-  protobuf: '>=0.10.4 <0.12.0'
+  protobuf: '>=0.10.4 <0.14.0'
 
 dev_dependencies:
   test: ^1.2.0