fix node version

Author: murat-dogan

README.md

@@ -18,11 +18,11 @@ npm install node-datachannel
 
 ## Supported Platforms
 
-`node-datachannel` targets N-API version 8 and supports Node.js v16 and above. It is tested on Linux, Windows and MacOS. For N-API compatibility please check [here](https://nodejs.org/api/n-api.html#n_api_n_api_version_matrix).
+`node-datachannel` targets N-API version 8 and supports Node.js v18.20 and above. It is tested on Linux, Windows and MacOS. For N-API compatibility please check [here](https://nodejs.org/api/n-api.html#n_api_n_api_version_matrix).
 
 |                           | Linux [x64,armv7,arm64] (1) | Windows [x86,x64] | Mac [M1,x64] |
 | ------------------------- | :-------------------------: | :---------------: | :----------: |
-| N-API v8 (>= Node.js v16) |              +              |         +         |      +       |
+| N-API v8 (>= Node.js v18) |              +              |         +         |      +       |
 
 **(1)** For Linux musl + libc