Update ClientAdapter.php (#6)

$paramOut gets overwritten and thus gives invalid urls when using more than 1 parameter.

Author: danijelk

src/ClientAdapters/ClientAdapter.php

@@ -55,12 +55,13 @@ private function buildRequestParameters($parameters)
 
         $paramOut = '';
         foreach ($parameters as $key=>$value) {
-            $paramOut = $key.'=';
+            $paramOut .= $key.'=';
             if (is_array($value)){
                 $paramOut .= join(',', $value);
             }else{
                 $paramOut .= $value;
             }
+            $paramOut .= '&';
         }
 
         return $paramOut;
@@ -85,4 +86,4 @@ abstract public function getForecast($latitude, $longitude, \DateTime $time = NU
      * @return array
      */
     abstract  public function getHeaders();
-}
+}