Flutter update (#516)

diff --git a/Dockerfile b/Dockerfile
index 7f4e00b..1b39227 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -6,7 +6,7 @@
 # To retrieve this value, please run the following in your closest shell:
 #
 # $ (cd flutter && git rev-parse HEAD)
-ARG FLUTTER_COMMIT=7f56b53de4e5da2147c4d30d857a72c6f2e4f42f
+ARG FLUTTER_COMMIT=e0c63cd35e15e407a80dc44281cc392535fcce25
 
 # We install unzip and remove the apt-index again to keep the
 # docker image diff small.
diff --git a/Dockerfile.cloud_run b/Dockerfile.cloud_run
index 87d44a0..fa6387a 100644
--- a/Dockerfile.cloud_run
+++ b/Dockerfile.cloud_run
@@ -6,7 +6,7 @@
 # To retrieve this value, please run the following in your closest shell:
 #
 # $ (cd flutter && git rev-parse HEAD)
-ARG FLUTTER_COMMIT=7f56b53de4e5da2147c4d30d857a72c6f2e4f42f
+ARG FLUTTER_COMMIT=e0c63cd35e15e407a80dc44281cc392535fcce25
 
 # We install unzip and remove the apt-index again to keep the
 # docker image diff small.
diff --git a/example/pubspec.lock b/example/pubspec.lock
index 06aee1b..ccb6bdf 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -112,7 +112,7 @@
       name: built_value
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "7.0.9"
+    version: "7.1.0"
   charcode:
     dependency: transitive
     description:
@@ -175,7 +175,7 @@
       name: dart_style
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.5"
+    version: "1.3.6"
   fixnum:
     dependency: transitive
     description:
@@ -210,7 +210,7 @@
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.0+4"
+    version: "0.12.1"
   http_multi_server:
     dependency: transitive
     description:
@@ -448,6 +448,6 @@
       name: yaml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.0"
+    version: "2.2.1"
 sdks:
   dart: ">=2.7.0 <3.0.0"
diff --git a/flutter b/flutter
index 7f56b53..e0c63cd 160000
--- a/flutter
+++ b/flutter
@@ -1 +1 @@
-Subproject commit 7f56b53de4e5da2147c4d30d857a72c6f2e4f42f
+Subproject commit e0c63cd35e15e407a80dc44281cc392535fcce25
diff --git a/pubspec.lock b/pubspec.lock
index e352cae..0494d35 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -98,14 +98,14 @@
       name: build_runner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.1"
+    version: "1.9.0"
   build_runner_core:
     dependency: transitive
     description:
       name: build_runner_core
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.0.0"
+    version: "5.1.0"
   built_collection:
     dependency: transitive
     description:
@@ -119,7 +119,7 @@
       name: built_value
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "7.0.9"
+    version: "7.1.0"
   charcode:
     dependency: transitive
     description:
@@ -196,7 +196,7 @@
       name: dart_style
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.4"
+    version: "1.3.6"
   dartis:
     dependency: "direct main"
     description:
@@ -273,7 +273,7 @@
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.0+4"
+    version: "0.12.1"
   http2:
     dependency: transitive
     description:
@@ -315,7 +315,7 @@
       name: intl
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.15.8"
+    version: "0.16.1"
   io:
     dependency: transitive
     description:
@@ -604,7 +604,7 @@
       name: tuneup
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.6+1"
+    version: "0.3.6+2"
   typed_data:
     dependency: transitive
     description:
@@ -625,14 +625,14 @@
       name: vm_service
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.0.1"
+    version: "4.0.2"
   watcher:
     dependency: transitive
     description:
       name: watcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.9.7+14"
+    version: "0.9.7+15"
   web_socket_channel:
     dependency: transitive
     description:
@@ -653,6 +653,6 @@
       name: yaml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.0"
+    version: "2.2.1"
 sdks:
   dart: ">=2.7.2 <3.0.0"