fix(Money): fix fraction digits type

Closes #429

Author: jenschude

composer.json

@@ -54,7 +54,7 @@
     "cache/filesystem-adapter": "^1.0",
     "cache/void-adapter": "^1.0",
     "incenteev/composer-parameter-handler": "^2.1",
-    "commercetools/commercetools-api-reference": "dev-master"
+    "commercetools/commercetools-api-reference": "dev-master#646973bdc9a5da9216fa8ae774ed51110186e3fa"
   },
   "replaces": {
     "commercetools/commons": "*"

src/Core/Model/Common/CentPrecisionMoney.php

@@ -13,8 +13,8 @@
  * @method CentPrecisionMoney setCentAmount(int $centAmount = null)
  * @method string getType()
  * @method CentPrecisionMoney setType(string $type = null)
- * @method string getFractionDigits()
- * @method CentPrecisionMoney setFractionDigits(string $fractionDigits = null)
+ * @method int getFractionDigits()
+ * @method CentPrecisionMoney setFractionDigits(int $fractionDigits = null)
  */
 class CentPrecisionMoney extends Money
 {
@@ -33,7 +33,7 @@ public function fieldDefinitions()
             static::CURRENCY_CODE => [self::TYPE => 'string'],
             static::CENT_AMOUNT => [self::TYPE => 'int'],
             static::TYPE => [self::TYPE => 'string'],
-            static::FRACTION_DIGITS => [self::TYPE => 'string']
+            static::FRACTION_DIGITS => [self::TYPE => 'int']
         ];
     }
 

src/Core/Model/Common/HighPrecisionMoney.php

@@ -13,8 +13,8 @@
  * @method HighPrecisionMoney setCentAmount(int $centAmount = null)
  * @method string getType()
  * @method HighPrecisionMoney setType(string $type = null)
- * @method string getFractionDigits()
- * @method HighPrecisionMoney setFractionDigits(string $fractionDigits = null)
+ * @method int getFractionDigits()
+ * @method HighPrecisionMoney setFractionDigits(int $fractionDigits = null)
  * @method int getPreciseAmount()
  * @method HighPrecisionMoney setPreciseAmount(int $preciseAmount = null)
  * @method string getHighPrecision()
@@ -39,7 +39,7 @@ public function fieldDefinitions()
             static::CURRENCY_CODE => [self::TYPE => 'string'],
             static::CENT_AMOUNT => [self::TYPE => 'int'],
             static::TYPE => [self::TYPE => 'string'],
-            static::FRACTION_DIGITS => [self::TYPE => 'string'],
+            static::FRACTION_DIGITS => [self::TYPE => 'int'],
             static::PRECISE_AMOUNT => [self::TYPE => 'int'],
         ];
     }