Clean up go.mod

go.mod

@@ -1,10 +1,11 @@
 module github.com/olivere/elastic/v7
 
-go 1.15
+go 1.16
 
 require (
-	github.com/aws/aws-sdk-go v1.40.32
+	github.com/aws/aws-sdk-go v1.40.43
 	github.com/fortytw2/leaktest v1.3.0
+	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/google/go-cmp v0.5.6
 	github.com/mailru/easyjson v0.7.7
 	github.com/opentracing/opentracing-go v1.2.0