feat(deps): Update depdendency versions for launchdarkly_common_client

Author: abarker-launchdarkly

packages/common_client/pubspec.yaml

@@ -9,8 +9,8 @@ environment:
 
 dependencies:
   http: ^1.1.2
-  launchdarkly_dart_common: 1.3.0
-  launchdarkly_event_source_client: 1.0.0
+  launchdarkly_dart_common: 1.5.0
+  launchdarkly_event_source_client: 1.2.0
   crypto: ^3.0.3
   uuid: ">= 3.0.7 <5.0.0"