CI/build: Update Go version, linters and fix minor issues (#1473)

* CI/build: Update Go version, linters and fix minor issues

* Bump golangci-lint to v1.56.1

* BinanceUS: Make uint usage consistent

* Throw blank identifiers into the trash

exchanges/bitfinex/bitfinex.go

@@ -1814,7 +1814,7 @@ func (b *Bitfinex) GetBalanceHistory(ctx context.Context, symbol string, timeSin
 	if limit > 0 {
 		req["limit"] = limit
 	}
-	if len(wallet) > 0 {
+	if wallet != "" {
 		req["wallet"] = wallet
 	}
 
@@ -1831,7 +1831,7 @@ func (b *Bitfinex) GetMovementHistory(ctx context.Context, symbol, method string
 	req := make(map[string]interface{})
 	req["currency"] = symbol
 
-	if len(method) > 0 {
+	if method != "" {
 		req["method"] = method
 	}
 	if !timeSince.IsZero() {
@@ -2301,22 +2301,22 @@ func (b *Bitfinex) PopulateAcceptableMethods(ctx context.Context) error {
 	storeData := make(map[string][]string)
 	for x := range data {
 		if len(data[x]) == 0 {
-			return fmt.Errorf("data should not be empty")
+			return errors.New("data should not be empty")
 		}
 		name, ok := data[x][0].(string)
 		if !ok {
-			return fmt.Errorf("unable to type assert name")
+			return errors.New("unable to type assert name")
 		}
 
 		var availOptions []string
 		options, ok := data[x][1].([]interface{})
 		if !ok {
-			return fmt.Errorf("unable to type assert options")
+			return errors.New("unable to type assert options")
 		}
 		for x := range options {
 			o, ok := options[x].(string)
 			if !ok {
-				return fmt.Errorf("unable to type assert option to string")
+				return errors.New("unable to type assert option to string")
 			}
 			availOptions = append(availOptions, o)
 		}

exchanges/bitfinex/bitfinex_wrapper.go

@@ -1082,7 +1082,7 @@ func (b *Bitfinex) AuthenticateWebsocket(ctx context.Context) error {
 
 // appendOptionalDelimiter ensures that a delimiter is present for long character currencies
 func (b *Bitfinex) appendOptionalDelimiter(p *currency.Pair) {
-	if (len(p.Base.String()) > 3 && len(p.Quote.String()) > 0) ||
+	if (len(p.Base.String()) > 3 && !p.Quote.IsEmpty()) ||
 		len(p.Quote.String()) > 3 {
 		p.Delimiter = ":"
 	}
@@ -1247,7 +1247,7 @@ func (b *Bitfinex) GetAvailableTransferChains(ctx context.Context, cryptocurrenc
 
 	availChains := acceptableMethods.lookup(cryptocurrency)
 	if len(availChains) == 0 {
-		return nil, fmt.Errorf("unable to find any available chains")
+		return nil, errors.New("unable to find any available chains")
 	}
 	return availChains, nil
 }