update quiver dependency

Author: kevmoo

pubspec.lock

@@ -180,7 +180,7 @@ packages:
       name: quiver
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.21.4"
+    version: "0.22.0"
   resource:
     description:
       name: resource

pubspec.yaml

@@ -16,7 +16,7 @@ dependencies:
   markdown: ^0.8.0
   mustache4dart: ^1.0.9
   path: ^1.3.0
-  quiver: '>=0.18.0 <0.22.0'
+  quiver: '>=0.18.0 <0.23.0'
   resource: ^1.1.0
   stack_trace: ^1.4.2
   yaml: ^2.1.0