Update dependencies. (#13778)

vendor/github.com/lib/pq/copy.go

@@ -229,7 +229,7 @@ func (ci *copyin) Exec(v []driver.Value) (r driver.Result, err error) {
 	}
 
 	if len(v) == 0 {
-		return nil, ci.Close()
+		return driver.RowsAffected(0), ci.Close()
 	}
 
 	numValues := len(v)