Update external go packages

go.mod

@@ -5,12 +5,12 @@ go 1.14
 require (
 	github.com/google/go-github/v47 v47.1.0
 	github.com/gregjones/httpcache v0.0.0-20190611155906-901d90724c79
-	github.com/palantir/go-baseapp v0.4.1
-	github.com/palantir/go-githubapp v0.14.0
+	github.com/palantir/go-baseapp v0.4.2
+	github.com/palantir/go-githubapp v0.16.0
 	github.com/pkg/errors v0.9.1
-	github.com/prometheus/client_golang v1.14.0
-	github.com/rs/zerolog v1.29.0
+	github.com/prometheus/client_golang v1.15.1
+	github.com/rs/zerolog v1.29.1
 	github.com/spf13/pflag v1.0.5
-	github.com/stretchr/testify v1.8.1
+	github.com/stretchr/testify v1.8.4
 	goji.io v2.0.2+incompatible // indirect
 )