TBR croupier: Shrink avatars

Too large

Change-Id: Ib47a6078d67ef904737fb957f57a22025aa4d71d
diff --git a/images/avatars/android.png b/images/avatars/android.png
index bbbdeef..e8568e6 100644
--- a/images/avatars/android.png
+++ b/images/avatars/android.png
Binary files differ
diff --git a/images/avatars/cat.png b/images/avatars/cat.png
index a07786f..de1487a 100644
--- a/images/avatars/cat.png
+++ b/images/avatars/cat.png
Binary files differ
diff --git a/images/avatars/man.png b/images/avatars/man.png
index 1cc56d4..f470233 100644
--- a/images/avatars/man.png
+++ b/images/avatars/man.png
Binary files differ
diff --git a/images/avatars/woman.png b/images/avatars/woman.png
index 38817cb..77515d5 100644
--- a/images/avatars/woman.png
+++ b/images/avatars/woman.png
Binary files differ
diff --git a/pubspec.lock b/pubspec.lock
index 4360dd9..0d9d601 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -174,15 +174,15 @@
   shelf:
     description: shelf
     source: hosted
-    version: "0.6.4+2"
+    version: "0.6.4+3"
   shelf_static:
     description: shelf_static
     source: hosted
-    version: "0.2.3+1"
+    version: "0.2.3+2"
   shelf_web_socket:
     description: shelf_web_socket
     source: hosted
-    version: "0.0.1+4"
+    version: "0.0.1+5"
   sky_engine:
     description: sky_engine
     source: hosted