Refactor: used goimports for files

packages/crypto/hash20.go

 package crypto
 
 import (
-    "crypto/sha256"
-    "golang.org/x/crypto/ripemd160"
+	"crypto/sha256"
+
+	"golang.org/x/crypto/ripemd160"
 )
 
 func Hash20(input []byte) []byte {
-    sha256Hasher := sha256.New()
-    sha256Hasher.Write(input)
+	sha256Hasher := sha256.New()
+	sha256Hasher.Write(input)
 
-    ripemd160Hasher := ripemd160.New()
-    ripemd160Hasher.Write(sha256Hasher.Sum(nil))
+	ripemd160Hasher := ripemd160.New()
+	ripemd160Hasher.Write(sha256Hasher.Sum(nil))
 
-    return ripemd160Hasher.Sum(nil)
+	return ripemd160Hasher.Sum(nil)
 }

plugins/autopeering/instances/knownpeers/instance.go

 package knownpeers
 
 import (
-    "github.com/iotaledger/goshimmer/packages/node"
-    "github.com/iotaledger/goshimmer/plugins/autopeering/instances/entrynodes"
-    "github.com/iotaledger/goshimmer/plugins/autopeering/types/peerregister"
+	"github.com/iotaledger/goshimmer/packages/node"
+	"github.com/iotaledger/goshimmer/plugins/autopeering/instances/entrynodes"
+	"github.com/iotaledger/goshimmer/plugins/autopeering/types/peerregister"
 )
 
 var INSTANCE *peerregister.PeerRegister
 
 func Configure(plugin *node.Plugin) {
-    INSTANCE = initKnownPeers()
+	INSTANCE = initKnownPeers()
 }
 
 func initKnownPeers() *peerregister.PeerRegister {
-    knownPeers := peerregister.New()
-    for _, entryNode := range entrynodes.INSTANCE {
-        knownPeers.AddOrUpdate(entryNode)
-    }
+	knownPeers := peerregister.New()
+	for _, entryNode := range entrynodes.INSTANCE {
+		knownPeers.AddOrUpdate(entryNode)
+	}
 
-    return knownPeers
+	return knownPeers
 }