fixing remaining linter issues

.travis.yml

@@ -1,10 +1,10 @@
 language: go
 
 go:
-  - 1.14.2
+  - 1.15.5
 
 install:
-  - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.30.0
+  - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(go env GOPATH)/bin v1.34.1
   - go get -t ./...
 
 script:

pkg/mux/client/client.go

@@ -6,6 +6,7 @@ import (
 	"crypto/sha512"
 	"encoding/hex"
 	"encoding/json"
+	"fmt"
 	"net"
 
 	"github.com/bitfinexcom/bitfinex-api-go/pkg/models/event"
@@ -61,7 +62,10 @@ func (c *Client) Private(key, sec string) *Client {
 
 	payload := "AUTH" + nonce
 	sig := hmac.New(sha512.New384, []byte(sec))
-	sig.Write([]byte(payload))
+	if _, err := sig.Write([]byte(payload)); err != nil {
+		fmt.Printf("err generating sig:%s\n", err)
+		return c
+	}
 	pldSign := hex.EncodeToString(sig.Sum(nil))
 	sub := event.Subscribe{
 		Event:       "auth",

pkg/mux/mux.go

@@ -181,13 +181,11 @@ func (m *Mux) handleEvent(i event.Info, err error) (event.Info, error) {
 	switch i.Event {
 	case "subscribed":
 		m.subInfo[i.ChanID] = i
-		break
 	case "auth":
 		if i.Status == "OK" {
 			m.subInfo[i.ChanID] = i
 			m.authenticated = true
 		}
-		break
 	default:
 		fmt.Printf("unhandled evtn: %+v\n", i)
 	}