Update pubspec.yaml

Version bump to match CHANGELOG.md

Author: AlexeyBukin

pkgs/shelf_router_generator/pubspec.yaml

@@ -1,5 +1,5 @@
 name: shelf_router_generator
-version: 1.1.1
+version: 1.1.2
 description: >
   A package:build-compatible builder for generating request routers for the
   shelf web-framework based on source annotations.