update readme

Author: AvivNaaman

README.md

@@ -2,7 +2,7 @@
 This is the first version of a pure Rust SMB client. Currently, the client provides basic functionalities (authentication, file transfer, info query/set) for SMB3.1.1 dialect only.
 
 ## Roadmap
-- [ ] Async support (top priority).
+- [x] Async support (top priority).
 - [ ] Older SMB dialects.
 - [ ] Additional compression/encryption/signing algorithms.
 - [ ] Performance tuning.
@@ -13,14 +13,15 @@ This is the first version of a pure Rust SMB client. Currently, the client provi
 The smb-cli crate implements a simple CLI for the SMB client.
 - It supports copying a file from a remote SMB server to a local machine.
     ```sh
-    cargo run -- -u LocalAdmin -p 123456 copy "\\\\172.16.204.149\MyShare\ntoskrnl.exe" ./test.exe
+    cargo run --features async -- -u LocalAdmin -p 123456 copy "\\\\172.16.204.149\MyShare\ntoskrnl.exe" ./test.exe
     ```
 - And querying information about a file or a directory:
     ```sh
-    cargo run -- -u LocalAdmin -p 123456 info "\\\\172.16.204.149\MyShare\ntoskrnl.exe"  # file
-    cargo run -- -u LocalAdmin -p 123456 info "\\\\172.16.204.149\MyShare"  # directory
+    cargo run --features async -- -u LocalAdmin -p 123456 info "\\\\172.16.204.149\MyShare\ntoskrnl.exe"  # file
+    cargo run --features async -- -u LocalAdmin -p 123456 info "\\\\172.16.204.149\MyShare"  # directory
     ```
 - View additional options:
     ```sh
     cargo run -- --help
-    ```
+    ```
+- Note: The `sync` feature is also available for the CLI, but no major advantages are used in the current version.