mojo/discovery: publish a new discovery mojo

Change-Id: I8573a1e5c8cf5b8be528a1ec6ae336e6bd09ccc4
diff --git a/pubspec.yaml b/pubspec.yaml
index ff2bddf..1e102c9 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -2,9 +2,9 @@
 description: Discovery is a discovery system for developers that makes it easy to advertise apps and scan for them. It works over MDNS and BLE.
 homepage: https://github.com/vanadium/mojo.discovery
 name: v23discovery
-version: 0.0.16
+version: 0.0.17
 dependencies:
-  mojo_sdk: 0.2.17
+  mojo_sdk: '>=0.2.19 <0.3.0'
 dev_dependencies:
   dart_style: any
   mojo_apptest: any