Update README.

Author: jmjoy

README.md

@@ -21,9 +21,9 @@ A library that allows us to write PHP extensions using pure Rust and using safe
 ### Tested Support
 
 - **OS**
-    - [x] linux
-    - [ ] macos
-    - [ ] windows
+  - [x] linux
+  - [ ] macos
+  - [ ] windows
 - **PHP**
   - **version**
     - [x] 7.0
@@ -47,79 +47,79 @@ A library that allows us to write PHP extensions using pure Rust and using safe
 
 1. Make sure `libclang` and `php` is installed.
 
-```bash
-# If you are using debian like linux system:
-sudo apt install llvm-10-dev libclang-10-dev php-cli
-```
-
-2. Create you cargo project, suppose your application is called myapp.
-
-```bash
-cargo new myapp
-```
-
-3. Add the dependencies and metadata to you Cargo project.
-
-```toml
-[lib]
-crate-type = ["cdylib"]
-
-[dependencies]
-phper = "0.3"
-```
-
-4. Add these code to `main.rs`.
-
-```rust,no_run
-use phper::cmd::make;
-
-fn main() {
-    make();
-}
-```
-
-5. Write you owned extension logic in `lib.rs`.
-
-```rust
-use phper::{php_get_module, modules::Module};
-
-#[php_get_module]
-pub fn get_module() -> Module {
-    let mut module = Module::new(
-        env!("CARGO_PKG_NAME"),
-        env!("CARGO_PKG_VERSION"),
-        env!("CARGO_PKG_AUTHORS"),
-    );
-
-    // ...
-
-    module
-}
-```
-
-6. Build and install, if your php isn't installed globally, you should specify the path of `php-config`.
-
-```bash
-# Optional, specify if php isn't installed globally.
-export PHP_CONFIG=<Your path of php-config>
-
-# Build libmyapp.so.
-cargo build --release
-
-# Install to php extension path.
-cargo run --release -- install
-# Or if you install php globally, you should use sudo.
-# sudo ./target/release/myapp install
-
-```
-
-7. Edit your `php.ini`, add the below line.
-
-```ini
-extension = myapp
-```
-
-8. Enjoy.
+   ```bash
+   # If you are using debian like linux system:
+   sudo apt install llvm-10-dev libclang-10-dev php-cli
+   ```
+
+1. Create you cargo project, suppose your application is called myapp.
+
+   ```bash
+   cargo new myapp
+   ```
+
+1. Add the dependencies and metadata to you Cargo project.
+
+   ```toml
+   [lib]
+   crate-type = ["cdylib"]
+ 
+   [dependencies]
+   phper = "<LATEST VERSION>"
+   ```
+
+1. Add these code to `main.rs`.
+
+   ```rust,no_run
+   use phper::cmd::make;
+   
+   fn main() {
+       make();
+   }
+   ```
+
+1. Write you owned extension logic in `lib.rs`.
+
+   ```rust
+   use phper::{php_get_module, modules::Module};
+   
+   #[php_get_module]
+   pub fn get_module() -> Module {
+       let mut module = Module::new(
+           env!("CARGO_PKG_NAME"),
+           env!("CARGO_PKG_VERSION"),
+           env!("CARGO_PKG_AUTHORS"),
+       );
+   
+       // ...
+   
+       module
+   }
+   ```
+
+1. Build and install, if your php isn't installed globally, you should specify the path of `php-config`.
+
+   ```bash
+   # Optional, specify if php isn't installed globally.
+   # export PHP_CONFIG=<Your path of php-config>
+   
+   # Build libmyapp.so.
+   cargo build --release
+   
+   # Install to php extension path.
+   cargo run --release -- install
+   # Or if you install php globally, you should use sudo.
+   # sudo ./target/release/myapp install
+   
+   ```
+
+1. Edit your `php.ini`, add the below line.
+
+   ```ini
+   extension = myapp
+   ```
+
+1. Enjoy.
 
 ## Examples