Upgrade mono_repo (#169)

diff --git a/pkgs/shelf_router/mono_pkg.yaml b/pkgs/shelf_router/mono_pkg.yaml
index 1256eb6..7fd029b 100644
--- a/pkgs/shelf_router/mono_pkg.yaml
+++ b/pkgs/shelf_router/mono_pkg.yaml
@@ -1,7 +1,5 @@
-dart:
-# todo: Test on stable after 2.12 is released
-#  - stable
-  - dev
+sdk:
+  - stable
 stages:
   - analyze:
       - analyze
diff --git a/pkgs/shelf_router_generator/mono_pkg.yaml b/pkgs/shelf_router_generator/mono_pkg.yaml
index dddd2df..7fd029b 100644
--- a/pkgs/shelf_router_generator/mono_pkg.yaml
+++ b/pkgs/shelf_router_generator/mono_pkg.yaml
@@ -1,6 +1,5 @@
-dart:
+sdk:
   - stable
-  - dev
 stages:
   - analyze:
       - analyze