Update README.md

Update benchmarks, and add `dependency-free`

README.md

@@ -1,9 +1,9 @@
 # Data to sound
 A simple crate to convert data to sound, and sound to data. The sound file format is wave (.wav).
-You can use it as a library or as a command line tool.
+You can use it as a library or as a command line tool. (dependency-free)
 
 ## Minimum supported Rust version
-The minimum supported Rust version is 1.56.1.
+The minimum supported Rust version is 1.59.0.
 
 ## Note
 The sound frequency is 202860Hz (202.86kHz), and the sound is mono. The sound is encoded in 16 bits.
@@ -51,13 +51,13 @@ The following benchmarks were made on a 4.600GHz 12th Gen Intel i7-12700H CPU wi
 ### Encoding
 | File size | Audio file size | Audio length | Speed | Link |
 |-----------|-----------------|------|-------| ---- |
-| 2687.94MB | 2687.94MB | 01:28:13 | 6.27s | [Soundcloud-link](https://soundcloud.com/awiteb/pop-os-2204-amd64-intel-23iso) |
-| 35.3MB | 35.3MB | 00:01::27 | 113.47ms | [Soundcloud-link](https://soundcloud.com/awiteb/rust-1671zip) |
+| 2687.94MB | 2687.94MB | 01:28:13 | 2.67s | [Soundcloud-link](https://soundcloud.com/awiteb/pop-os-2204-amd64-intel-23iso) |
+| 35.3MB | 35.3MB | 00:01::27 | 51.34ms | [Soundcloud-link](https://soundcloud.com/awiteb/rust-1671zip) |
 ## Decoding
 | File size | Audio file size | Audio length | Speed | Link |
 |-----------|-----------------|------|-------| ---- |
-| 2687.94MB | 2687.94MB | 01:28:13 | 5.14s | [Soundcloud-link](https://soundcloud.com/awiteb/pop-os-2204-amd64-intel-23iso) |
-| 35.3MB | 35.3MB | 00:01::27 | 117.58ms | [Soundcloud-link](https://soundcloud.com/awiteb/rust-1671zip) |
+| 2687.94MB | 2687.94MB | 01:28:13 | 2.79s | [Soundcloud-link](https://soundcloud.com/awiteb/pop-os-2204-amd64-intel-23iso) |
+| 35.3MB | 35.3MB | 00:01::27 | 68.21ms | [Soundcloud-link](https://soundcloud.com/awiteb/rust-1671zip) |
 
 ## Disclaimer
 This tool was designed for educational purposes as it explains how to save data in an audio file. It is not recommended to exploit this thing to use cloud audio storage services to store your data, as your account may be banned.