chore(pubspec): Upgrade to DI 1.2.2

Author: jbdeboer

pubspec.lock

@@ -32,7 +32,7 @@ packages:
   di:
     description: di
     source: hosted
-    version: "1.2.1"
+    version: "1.2.2"
   guinness:
     description: guinness
     source: hosted

pubspec.yaml

@@ -19,7 +19,7 @@ dependencies:
   browser: '>=0.10.0 <0.11.0'
   code_transformers: '>=0.1.3 <0.2.0'
   collection: '>=0.9.1 <1.0.0'
-  di: '>=1.2.1 <2.0.0'
+  di: '>=1.2.2 <2.0.0'
   html5lib: '>=0.10.0 <0.11.0'
   intl: '>=0.8.7 <0.10.0'
   perf_api: '>=0.0.8 <0.1.0'