upgrade ng-rocksd to ngpreview-4

Cargo.lock

@@ -3448,8 +3448,8 @@ dependencies = [
 
 [[package]]
 name = "ng-rocksdb"
-version = "0.21.0-ngpreview.3"
+version = "0.21.0-ngpreview.4"
-source = "git+https://git.nextgraph.org/NextGraph/rust-rocksdb.git?branch=master#87f6cc1ec0bd265025d8afbee565e129aa0c2273"
+source = "git+https://git.nextgraph.org/NextGraph/rust-rocksdb.git?branch=master#e566341c319eead6637b1aecce5e92136e946ae5"
 dependencies = [
  "bindgen",
  "bzip2-sys",

ng-oxigraph/Cargo.toml

@@ -49,7 +49,7 @@ base64-url = "2.0.0"
 
 [target.'cfg(all(not(target_family = "wasm"),not(docsrs)))'.dependencies]
 libc = "0.2"
-ng-rocksdb = { version = "0.21.0-ngpreview.3", git = "https://git.nextgraph.org/NextGraph/rust-rocksdb.git", branch = "master", features = [  ] }
+ng-rocksdb = { version = "0.21.0-ngpreview.4", git = "https://git.nextgraph.org/NextGraph/rust-rocksdb.git", branch = "master", features = [  ] }
 
 [target.'cfg(all(target_family = "wasm", target_os = "unknown"))'.dependencies]
 getrandom = "0.2.8"

ng-storage-rocksdb/Cargo.toml

@@ -20,4 +20,4 @@ ng-repo = { path = "../ng-repo", version = "0.1.0-preview.1" }
 git = "https://git.nextgraph.org/NextGraph/rust-rocksdb.git"
 branch = "master"
 features = [  ]
-version = "0.21.0-ngpreview.3"
+version = "0.21.0-ngpreview.4"