docs: make it more cozy

Author: adhocore

readme.md

@@ -18,49 +18,70 @@ composer require adhocore/jwt
 ```
 
 ## Usage
+
 ```php
 use Ahc\Jwt\JWT;
 
 // Instantiate with key, algo, maxAge and leeway.
 $jwt = new JWT('secret', 'HS256', 3600, 10);
+```
 
-// Only the key is required. Defaults will be used for the rest:
-// algo = HS256, maxAge = 3600, leeway = 0
+Only the key is required. Defaults will be used for the rest:
+```php
 $jwt = new JWT('secret');
+// algo = HS256, maxAge = 3600, leeway = 0
+```
 
-// For RS* algo, the key should be either a resource like below:
+For `RS*` algo, the key should be either a resource like below:
+```php
 $key = openssl_pkey_new(['digest_alg' => 'sha256', 'private_key_bits' => 1024, 'private_key_type' => OPENSSL_KEYTYPE_RSA]);
+
 // OR, a string with full path to the RSA private key like below:
 $key = '/path/to/rsa.key';
+
 // Then, instantiate JWT with this key and RS* as algo:
 $jwt = new JWT($key, 'RS384');
+```
 
-// Generate JWT token from payload array.
+Generate JWT token from payload array:
+```php
 $token = $jwt->encode([
     'uid'    => 1,
     'aud'    => 'http://site.com',
     'scopes' => ['user'],
     'iss'    => 'http://api.mysite.com',
 ]);
+```
 
-// Retrieve the payload array.
+Retrieve the payload array:
+```php
 $payload = $jwt->decode($token);
+```
 
-// Oneliner.
+Oneliner:
+```
 $token   = (new JWT('topSecret', 'HS512', 1800))->encode(['uid' => 1, 'scopes' => ['user']]));
 $payload = (new JWT('topSecret', 'HS512', 1800))->decode($token);
+```
+
+***Pro***
 
-// Can pass extra headers into encode() with second parameter.
+Can pass extra headers into encode() with second parameter:
+```php
 $token = $jwt->encode($payload, ['hdr' => 'hdr_value']);
+```
 
-// Spoof time() for testing token expiry.
+Spoof time() for testing token expiry:
+```php
 $jwt->setTestTimestamp(time() + 10000);
+
 // Throws Exception.
 $jwt->parse($token);
+```
 
-// Call again without parameter to stop spoofing time().
+Call again without parameter to stop spoofing time():
+```php
 $jwt->setTestTimestamp();
-
 ```
 
 ## Features