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>

util/sync/manager.go

@@ -3,8 +3,8 @@ package sync
 import (
 	"time"
 
-	"github.com/unistack-org/micro/v3/store"
 	"github.com/pkg/errors"
+	"github.com/unistack-org/micro/v3/store"
 )
 
 type operation struct {

util/sync/sync.go

@@ -7,8 +7,8 @@ import (
 	"time"
 
 	"github.com/ef-ds/deque"
-	"github.com/unistack-org/micro/v3/store"
 	"github.com/pkg/errors"
+	"github.com/unistack-org/micro/v3/store"
 )
 
 // Sync implements a sync in for stores