Update to Flutter 1.18.0-11.1.pre (#558)

diff --git a/.travis.yml b/.travis.yml
index 2f4aab8..c0a6810 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,7 +3,7 @@
   - gem install coveralls-lcov
 dart:
   # Keep this value aligned with min SDK value in pubspec.yaml and FROM line of Dockerfile
-  - "2.8.1"
+  - "2.8.2"
   - beta
 
 # Use Ubuntu 18.04 (Bionic Beaver) 
diff --git a/Dockerfile b/Dockerfile
index 4c9b343..14c96b1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,12 +1,12 @@
 # Keep aligned with min SDK in pubspec.yaml and Dart test version in .travis.yml
-FROM google/dart:2.8.1
+FROM google/dart:2.8.2
 
 # The specific commit that dart-services should use. This should be kept
 # in sync with the flutter submodule in the dart-services repo.
 # To retrieve this value, please run the following in your closest shell:
 #
 # $ (cd flutter && git rev-parse HEAD)
-ARG FLUTTER_COMMIT=e6b34c2b5c96bb95325269a29a84e83ed8909b5f
+ARG FLUTTER_COMMIT=2738a1148ba6c9a6114df62358109407c3ef2553
 
 # We install unzip and remove the apt-index again to keep the
 # docker image diff small.
diff --git a/cloud_run.Dockerfile b/cloud_run.Dockerfile
index 6f4eac7..76c33b6 100644
--- a/cloud_run.Dockerfile
+++ b/cloud_run.Dockerfile
@@ -1,12 +1,12 @@
 # Keep aligned with min SDK in pubspec.yaml and Dart test version in .travis.yml
-FROM google/dart:2.8.1
+FROM google/dart:2.8.2
 
 # The specific commit that dart-services should use. This should be kept
 # in sync with the flutter submodule in the dart-services repo.
 # To retrieve this value, please run the following in your closest shell:
 #
 # $ (cd flutter && git rev-parse HEAD)
-ARG FLUTTER_COMMIT=e6b34c2b5c96bb95325269a29a84e83ed8909b5f
+ARG FLUTTER_COMMIT=2738a1148ba6c9a6114df62358109407c3ef2553
 
 # We install unzip and remove the apt-index again to keep the
 # docker image diff small.
diff --git a/flutter b/flutter
index e6b34c2..2738a11 160000
--- a/flutter
+++ b/flutter
@@ -1 +1 @@
-Subproject commit e6b34c2b5c96bb95325269a29a84e83ed8909b5f
+Subproject commit 2738a1148ba6c9a6114df62358109407c3ef2553
diff --git a/pubspec.lock b/pubspec.lock
index d7a890b..9e6e699 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -385,14 +385,14 @@
       name: node_interop
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   node_io:
     dependency: transitive
     description:
       name: node_io
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.1.1"
   node_preamble:
     dependency: transitive
     description:
@@ -644,7 +644,7 @@
       name: webkit_inspection_protocol
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.5.3"
+    version: "0.5.4"
   yaml:
     dependency: "direct main"
     description:
@@ -653,4 +653,4 @@
     source: hosted
     version: "2.2.1"
 sdks:
-  dart: ">=2.8.1 <3.0.0"
+  dart: ">=2.8.2 <3.0.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 58fa260..8cfd07c 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -3,7 +3,7 @@
 
 environment:
   # Keep SDK aligned with .travis.yml and FROM line of Dockerfile
-  sdk: ^2.8.1
+  sdk: ^2.8.2
 
 dependencies:
   analyzer: ^0.39.0