Really upgrade goleveldb to the latest master version

PR #876 actually upgraded goleveldb to 1.0.0, not to the latest master.

Recent changes to goleveldb should improve performance
syndtr/goleveldb#226 (comment)

go.mod

@@ -29,7 +29,7 @@ require (
 	github.com/smira/go-ftp-protocol v0.0.0-20140829150050-066b75c2b70d
 	github.com/smira/go-xz v0.0.0-20150414201226-0c531f070014
 	github.com/stretchr/testify v1.4.0 // indirect
-	github.com/syndtr/goleveldb v1.0.0
+	github.com/syndtr/goleveldb v1.0.1-0.20190923125748-758128399b1d
 	github.com/ugorji/go v1.1.4
 	github.com/wsxiaoys/terminal v0.0.0-20160513160801-0940f3fc43a0
 	golang.org/x/crypto v0.0.0-20180403160946-b2aa35443fbc

go.sum

@@ -20,8 +20,8 @@ github.com/gin-gonic/gin v1.1.5-0.20170702092826-d459835d2b07 h1:Gm6bjW5SQ/sIib9
 github.com/gin-gonic/gin v1.1.5-0.20170702092826-d459835d2b07/go.mod h1:7cKuhb5qV2ggCFctp2fJQ+ErvciLZrIeoOSOm6mUr7Y=
 github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db h1:woRePGFeVFfLKN/pOkfl+p/TAqKOfFu+7KPlMVpok/w=
-github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
+github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/h2non/filetype v1.0.5 h1:Esu2EFM5vrzNynnGQpj0nxhCkzVQh2HRY7AXUh/dyJM=
 github.com/h2non/filetype v1.0.5/go.mod h1:isekKqOuhMj+s/7r3rIeTErIRy4Rub5uBWHfvMusLMU=
 github.com/hpcloud/tail v1.0.0 h1:nfCOvKYfkgYP8hkirhJocXT2+zOD8yUNjXaWfTlyFKI=
@@ -74,8 +74,8 @@ github.com/smira/go-xz v0.0.0-20150414201226-0c531f070014/go.mod h1:smSuTvETRIkX
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-github.com/syndtr/goleveldb v1.0.0 h1:fBdIW9lB4Iz0n9khmH8w27SJ3QEJ7+IgjPEwGSZiFdE=
-github.com/syndtr/goleveldb v1.0.0/go.mod h1:ZVVdQEZoIme9iO1Ch2Jdy24qqXrMMOU6lpPAyBWyWuQ=
+github.com/syndtr/goleveldb v1.0.1-0.20190923125748-758128399b1d h1:gZZadD8H+fF+n9CmNhYL1Y0dJB+kLOmKd7FbPJLeGHs=
+github.com/syndtr/goleveldb v1.0.1-0.20190923125748-758128399b1d/go.mod h1:9OrXJhf154huy1nPWmuSrkgjPUtUNhA+Zmy+6AESzuA=
 github.com/ugorji/go v1.1.4 h1:j4s+tAvLfL3bZyefP2SEWmhBzmuIlH/eqNuPdFPgngw=
 github.com/ugorji/go v1.1.4/go.mod h1:uQMGLiO92mf5W77hV/PUCpI3pbzQx3CRekS0kk+RGrc=
 github.com/wsxiaoys/terminal v0.0.0-20160513160801-0940f3fc43a0 h1:3UeQBvD0TFrlVjOeLOBz+CPAI8dnbqNSVwUwRrkp7vQ=