[slf4] bump dependency versions

Change-Id: I2699b4449f93c7a179f806b58adc6555333ddd53
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/405220
Reviewed-by: Andrew Wilson <anwilson@google.com>
Commit-Queue: Chase Latta <chaselatta@google.com>
diff --git a/sdk/testing/sl4f/client/dart_dependencies.yaml b/sdk/testing/sl4f/client/dart_dependencies.yaml
index de1abba..10a9fd2 100644
--- a/sdk/testing/sl4f/client/dart_dependencies.yaml
+++ b/sdk/testing/sl4f/client/dart_dependencies.yaml
@@ -4,5 +4,5 @@
 
 name:
 dependencies:
-  image: ^2.0.7
+  image: ^2.1.14
   webdriver: ^2.1.0