chore: updated readme

Author: frknasir

README.md

@@ -37,22 +37,17 @@ Simple usage looks like:
 
 ```php
 use StarfolkSoftware\Flutterwave\Client as FlutterwaveClient;
-use StarfolkSoftware\Flutterwave\Options\CreatePlanOptions;
-use StarfolkSoftware\Flutterwave\Options;
 
-$flutterwave = new FlutterwaveClient(new Options([
+$flutterwave = new FlutterwaveClient([
     'secretKey' => 'secret',
-]));
+]);
 
-$response = $flutterwave
-    ->plan()
-    ->create(
-        new CreatePlanOptions([
+$response = $flutterwave->plans()
+        ->create([
             'name' => 'Test Plan',
             'amount' => 100,
             'interval' => 'monthly'
-        ])
-    );
+        ]);
 
 echo $response;
 ```

src/Client.php

@@ -69,7 +69,7 @@ public function getHttpClient(): HttpMethodsClientInterface
      * 
      * @return Plan
      */
-    public function plan(): Plan
+    public function plans(): Plan
     {
         return new Plan($this);
     }
@@ -79,7 +79,7 @@ public function plan(): Plan
      * 
      * @return Subscription
      */
-    public function subscription(): Subscription
+    public function subscriptions(): Subscription
     {
         return new Subscription($this);
     }
@@ -89,7 +89,7 @@ public function subscription(): Subscription
      * 
      * @return Charge
      */
-    public function charge(): Charge
+    public function charges(): Charge
     {
         return new Charge($this);
     }
@@ -99,7 +99,7 @@ public function charge(): Charge
      * 
      * @return Transaction
      */
-    public function transaction(): Transaction
+    public function transactions(): Transaction
     {
         return new Transaction($this);
     }