Require Dart 2.2 – because pkg:pedantic

pkgs/stream_channel/.travis.yml

diff --git a/pkgs/stream_channel/.travis.yml b/pkgs/stream_channel/.travis.yml
index 69f24c3..d6a5454 100644
--- a/pkgs/stream_channel/.travis.yml
+++ b/pkgs/stream_channel/.travis.yml
@@ -1,7 +1,7 @@
 language: dart
 
 dart:
-- 2.0.0
+- 2.2.0
 - dev
 
 dart_task:
@@ -15,7 +15,7 @@
   - dart: dev
     dart_task:
       dartanalyzer: --fatal-infos --fatal-warnings .
-  - dart: 2.0.0
+  - dart: 2.2.0
     dart_task:
       dartanalyzer: --fatal-warnings .
 

pkgs/stream_channel/CHANGELOG.md

diff --git a/pkgs/stream_channel/CHANGELOG.md b/pkgs/stream_channel/CHANGELOG.md
index 24564ed..4f34510 100644
--- a/pkgs/stream_channel/CHANGELOG.md
+++ b/pkgs/stream_channel/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 2.1.0
+
+* Require Dart `2.2.0` or later.
+
 ## 2.0.0
 
 **Breaking changes**

pkgs/stream_channel/pubspec.yaml

diff --git a/pkgs/stream_channel/pubspec.yaml b/pkgs/stream_channel/pubspec.yaml
index bef50e1..61e78c0 100644
--- a/pkgs/stream_channel/pubspec.yaml
+++ b/pkgs/stream_channel/pubspec.yaml
@@ -1,5 +1,5 @@
 name: stream_channel
-version: 2.0.1-dev
+version: 2.1.0-dev
 
 description: >-
   An abstraction for two-way communication channels based on the Dart Stream
@@ -8,7 +8,7 @@
 homepage: https://github.com/dart-lang/stream_channel
 
 environment:
-  sdk: '>=2.0.0 <3.0.0'
+  sdk: '>=2.2.0 <3.0.0'
 
 dependencies:
   async: '>=1.11.0 <3.0.0'