Added shipping price methods to contract

Fixed typo

Author: Rik Morskate

src/Contracts/SendcloudContract.php

@@ -24,6 +24,8 @@ public function parcelStatuses(): array;
 
     public function shippingMethods(array $optionalParameters = []): array;
 
+    public function shippingPrice(int $shippingMethodId, string $fromCountry, int $weight, string $weightUnit, array $optionalParameters = []): array;
+
     public function download(string $url): string;
 
     public function verbose(bool $verbose = true): self;

src/Sendcloud.php

@@ -57,14 +57,14 @@ public function shippingMethods(array $optionalParameters = []): array
     }
 
     public function shippingPrice(
-        int $shipingMethodId,
+        int $shippingMethodId,
         string $fromCountry,
         int $weight,
         string $weightUnit,
         array $optionalParameters = []
     ): array {
         $parameters = [
-            'shipping_method_id' => $shipingMethodId,
+            'shipping_method_id' => $shippingMethodId,
             'from_country'       => $fromCountry,
             'weight'             => $weight,
             'weight_unit'        => $weightUnit,