mojo/discovery: allowing a wider range for the mojo dependency.

Change-Id: Ic960e8a52406838abc6358d1cbf12de236b24a0f
diff --git a/pubspec.yaml b/pubspec.yaml
index a15c9ed..573e5fe 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: 0.0.1
+version: 0.0.2
 dependencies:
-  mojo: '>=0.4.0 <0.5.0'
+  mojo: '>=0.3.0 <0.5.0'
 dev_dependencies:
   dart_style: any
   test: any