Fix visibility of ApiKeyInterceptor's constructor

Author: rubengees

library/src/main/java/com/proxerme/library/connection/ProxerConnection.java

@@ -445,7 +445,7 @@ private class ApiKeyInterceptor implements Interceptor {
 
             private String apiKey;
 
-            public ApiKeyInterceptor(String apiKey) {
+            ApiKeyInterceptor(String apiKey) {
                 this.apiKey = apiKey;
             }