Upgrade to golangci-lint v0.19.0 (#346)

..and fix one new issue

Author: corneliusweig

cmd/krew/cmd/list.go

@@ -72,10 +72,10 @@ Remarks:
 
 func printTable(out io.Writer, columns []string, rows [][]string) error {
 	w := tabwriter.NewWriter(out, 0, 0, 2, ' ', 0)
-	fmt.Fprintf(w, strings.Join(columns, "\t"))
+	fmt.Fprint(w, strings.Join(columns, "\t"))
 	fmt.Fprintln(w)
 	for _, values := range rows {
-		fmt.Fprintf(w, strings.Join(values, "\t"))
+		fmt.Fprint(w, strings.Join(values, "\t"))
 		fmt.Fprintln(w)
 	}
 	return w.Flush()

hack/run-lint.sh

@@ -23,7 +23,7 @@ gopath="$(go env GOPATH)"
 if ! [[ -x "$gopath/bin/golangci-lint" ]]; then
   echo >&2 'Installing golangci-lint'
   curl --silent --fail --location \
-    https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b "$gopath/bin" v1.18.0
+    https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b "$gopath/bin" v1.19.0
 fi
 
 # configured by .golangci.yml