enable cache for build, closes #8 (#12)

* enable cache for build, closes #8
* goimports
* lint fixes

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

store/cockroach/cockroach.go

@@ -11,9 +11,9 @@ import (
 	"time"
 
 	"github.com/lib/pq"
+	"github.com/pkg/errors"
 	"github.com/unistack-org/micro/v3/logger"
 	"github.com/unistack-org/micro/v3/store"
-	"github.com/pkg/errors"
 )
 
 // DefaultDatabase is the namespace that the sql store

store/cockroach/cockroach_test.go

@@ -3,6 +3,7 @@ package cockroach
 import (
 	"database/sql"
 	"fmt"
+	"os"
 	"testing"
 	"time"
 
@@ -11,6 +12,9 @@ import (
 )
 
 func TestSQL(t *testing.T) {
+	if len(os.Getenv("IN_TRAVIS_CI")) > 0 {
+		t.Skip()
+	}
 	connection := fmt.Sprintf(
 		"host=%s port=%d user=%s sslmode=disable dbname=%s",
 		"localhost",