CLEANUP: go mod tidy + coreth.

go.mod

@@ -4,10 +4,10 @@ go 1.14
 
 require (
 	github.com/AppsFlyer/go-sundheit v0.2.0
-	github.com/Microsoft/go-winio v0.4.14 // indirect
+	github.com/Microsoft/go-winio v0.4.14
 	github.com/allegro/bigcache v1.2.1 // indirect
 	github.com/aristanetworks/goarista v0.0.0-20200812190859-4cb0e71f3c0e // indirect
-	github.com/ava-labs/coreth v0.2.13 // indirect
+	github.com/ava-labs/coreth v0.2.13
 	github.com/ava-labs/go-ethereum v1.9.3
 	github.com/btcsuite/btcutil v1.0.2
 	github.com/decred/dcrd/dcrec/secp256k1/v3 v3.0.0-20200627015759-01fd2de07837
@@ -35,4 +35,5 @@ require (
 	golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9
 	golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2
 	google.golang.org/grpc v1.29.1
+	gopkg.in/natefinch/npipe.v2 v2.0.0-20160621034901-c1b8fa8bdcce // indirect
 )