Update Go deps

Change-Id: Ia2157e78de88bab2b949e37a142b51d75ec2d15c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/229606
Reviewed-by: <skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com>
Commit-Queue: <skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com>
diff --git a/go.mod b/go.mod
index ae59dd3..08bcb5e 100644
--- a/go.mod
+++ b/go.mod
@@ -4,12 +4,15 @@
 
 require (
 	cloud.google.com/go v0.43.0
-	github.com/aws/aws-sdk-go v1.21.3 // indirect
+	github.com/aws/aws-sdk-go v1.21.4 // indirect
 	github.com/flynn/json5 v0.0.0-20160717195620-7620272ed633
 	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b
 	github.com/google/uuid v1.1.1
-	go.chromium.org/luci v0.0.0-20190724003035-08680f442c78 // indirect
-	go.skia.org/infra v0.0.0-20190723181410-2eb9a388d03e
-	golang.org/x/net v0.0.0-20190724013045-ca1201d0de80 // indirect
+	github.com/json-iterator/go v1.1.7 // indirect
+	github.com/prometheus/tsdb v0.10.0 // indirect
+	go.chromium.org/luci v0.0.0-20190724231553-985b1d72a776 // indirect
+	go.skia.org/infra v0.0.0-20190724193217-2897f1157cf5
+	golang.org/x/tools v0.0.0-20190724185037-8aa4eac1a7c1 // indirect
 	google.golang.org/api v0.7.0
+	sigs.k8s.io/structured-merge-diff v0.0.0-20190724202554-0c1d754dd648 // indirect
 )