Merge pull request #17 from linked-planet/feature/open_page2

make Page an open class

Author: HighKo

kotlin-atlassian-client-core-common/src/main/kotlin/com/linkedplanet/kotlinatlassianclientcore/common/api/Page.kt

@@ -21,7 +21,7 @@ package com.linkedplanet.kotlinatlassianclientcore.common.api
 
 import javax.validation.constraints.NotNull
 
-data class Page<T> (
+open class Page<T> (
     @field:NotNull val items: List<T>,
     @field:NotNull val totalItems: Int,
     @field:NotNull val totalPages: Int,