Merge pull request #875 from SuLG-ik/main-button-off-click-issue

Make MainButton.onClick(() -> Unit) and MainButton.offClick(() -> Unit) public

tgbotapi.webapps/src/jsMain/kotlin/dev/inmo/tgbotapi/webapps/MainButton.kt

@@ -22,8 +22,8 @@ external class MainButton {
     fun showProgress(leaveActive: Boolean = definedExternally): MainButton
     fun hideProgress(): MainButton
 
-    internal fun onClick(eventHandler: () -> Unit): MainButton
-    internal fun offClick(eventHandler: () -> Unit): MainButton
+    fun onClick(eventHandler: () -> Unit): MainButton
+    fun offClick(eventHandler: () -> Unit): MainButton
 
     internal fun setParams(params: Json): MainButton
 }
@@ -36,6 +36,7 @@ data class MainButtonParams(
     val isVisible: Boolean? = null
 )
 
+@Deprecated(message="Use onClick without EventHandler")
 fun MainButton.onClick(eventHandler: EventHandler) = onClick {
     val that = js("this").unsafeCast<WebApp>()
     that.eventHandler()