Add jvm overloads (#91)

* Add Jvm overloads

* Some refactoring

Author: DHosseiny

poolakey/src/main/java/ir/cafebazaar/poolakey/Payment.kt

@@ -21,7 +21,7 @@ import ir.cafebazaar.poolakey.thread.PoolakeyThread
 
 class Payment(
     context: Context,
-    private val config: PaymentConfiguration
+    config: PaymentConfiguration
 ) {
 
     private val backgroundThread: PoolakeyThread<Runnable> = BackgroundThread()

poolakey/src/main/java/ir/cafebazaar/poolakey/config/PaymentConfiguration.kt

@@ -1,6 +1,6 @@
 package ir.cafebazaar.poolakey.config
 
-data class PaymentConfiguration(
+data class PaymentConfiguration @JvmOverloads constructor(
     val localSecurityCheck: SecurityCheck,
     val shouldSupportSubscription: Boolean = true
-)
+)