fix: rename get withdrawal fees hash method name

Author: T. Ismael Verdugo

src/main/java/com/cryptomarket/sdk/rest/CryptomarketRestClient.java

@@ -1429,7 +1429,7 @@ public String getEstimateWithdrawalFee(String currency, String amount, @Nullable
      * @return the fees hash
      * @throws CryptomarketSDKException
      */
-    public String getFeesHash() throws CryptomarketSDKException;
+    public String getWithdrawalFeesHash() throws CryptomarketSDKException;
 
     /**
      * Get an estimate of the deposit fee

src/main/java/com/cryptomarket/sdk/rest/CryptomarketRestClientImpl.java

@@ -937,7 +937,7 @@ public List<Fee> getBulkEstimateWithdrawalFees(List<FeeRequest> feeRequests) thr
   }
 
   @Override
-  public String getFeesHash() throws CryptomarketSDKException {
+  public String getWithdrawalFeesHash() throws CryptomarketSDKException {
     String jsonResponse = httpClient.get("wallet/crypto/fee/withdraw/hash", null);
     return adapter.objectFromJsonValue(jsonResponse, "hash", String.class);
   }

src/test/java/com/cryptomarket/sdk/TestRestClientWalletManagement.java

@@ -144,7 +144,7 @@ public void testGetEstimateWithdrawFee() throws CryptomarketSDKException {
   }
   @Test
   public void testGetEstimateWithdrawFeesHash() throws CryptomarketSDKException {
-    String estimate = client.getFeesHash();
+    String estimate = client.getWithdrawalFeesHash();
     if (estimate.equals("")) {
       fail();
     }