docs: add support matrix in crc32 README

Author: LongYinan

README.md

@@ -2,6 +2,10 @@
 
 When `NodeJS` meet `Rust` = 🚀
 
+# napi-rs
+
+Make rust crates binding to NodeJS use [napi-rs](https://github.com/Brooooooklyn/napi-rs)
+
 # Support matrix
 
 |                   | node 10 | node12 | node13 | node14 |
@@ -12,6 +16,6 @@ When `NodeJS` meet `Rust` = 🚀
 
 # Packages
 
-| Package          | Status                                                              | Description                                 |
-| ---------------- | ------------------------------------------------------------------- | ------------------------------------------- |
-| `@node-rs/crc32` | ![](https://github.com/Brooooooklyn/node-rs/workflows/CI/badge.svg) | Fastest `CRC32` implementation using `SIMD` |
+| Package                                        | Status                                                              | Description                                 |
+| ---------------------------------------------- | ------------------------------------------------------------------- | ------------------------------------------- |
+| [`@node-rs/crc32`](./packages/crc32/README.md) | ![](https://github.com/Brooooooklyn/node-rs/workflows/CI/badge.svg) | Fastest `CRC32` implementation using `SIMD` |

packages/crc32/README.md

@@ -1,7 +1,17 @@
 # `@node-rs/crc32`
 
+![](https://github.com/Brooooooklyn/node-rs/workflows/CI/badge.svg)
+
 Fastest `crc32` implement in `NodeJS`
 
+# Support matrix
+
+|                   | node 10 | node12 | node13 | node14 |
+| ----------------- | ------- | ------ | ------ | ------ |
+| Windows 64 latest | ✅      | ✅     | ✅     | ✅     |
+| macOS latest      | ✅      | ✅     | ✅     | ✅     |
+| Linux             | ✅      | ✅     | ✅     | ✅     |
+
 ## API
 
 ```ts