Bug 1408776 - Update taskcluster-client from 2.5.0 to 2.5.4

https://github.com/taskcluster/taskcluster-client/compare/v2.5.0...v2.5.4

package.json

@@ -42,7 +42,7 @@
     "raw-loader": "0.5.1",
     "react": "15.3.2",
     "react-dom": "15.3.2",
-    "taskcluster-client": "2.5.0"
+    "taskcluster-client": "2.5.4"
   },
   "devDependencies": {
     "angular-mocks": "1.5.11",

yarn.lock

@@ -6440,9 +6440,9 @@ tar@^2.2.1:
     fstream "^1.0.2"
     inherits "2"
 
-taskcluster-client@2.5.0:
-  version "2.5.0"
-  resolved "https://registry.yarnpkg.com/taskcluster-client/-/taskcluster-client-2.5.0.tgz#11d3b212e0be43070434c2a1427950ddeae01cd1"
+taskcluster-client@2.5.4:
+  version "2.5.4"
+  resolved "https://registry.yarnpkg.com/taskcluster-client/-/taskcluster-client-2.5.4.tgz#6a1e51e995e4e034a5eaf3f1d91badbb4f2ca1e1"
   dependencies:
     amqplib "^0.5.1"
     debug "^2.1.3"