add raw fields for polls

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/ChatJoinRequest.kt

@@ -1,5 +1,6 @@
 package dev.inmo.tgbotapi.types
 
+import com.soywiz.klock.DateTime
 import dev.inmo.tgbotapi.CommonAbstracts.FromUser
 import dev.inmo.tgbotapi.types.chat.abstracts.PublicChat
 import kotlinx.serialization.SerialName
@@ -20,4 +21,7 @@ data class ChatJoinRequest(
     val inviteLink: ChatInviteLink,
     @SerialName(bioField)
     val bio: String? = null
-) : FromUser
+) : FromUser {
+    val dateTime: DateTime
+        get() = date.asDate
+}

tgbotapi.core/src/commonMain/kotlin/dev/inmo/tgbotapi/types/polls/Poll.kt

@@ -54,7 +54,9 @@ sealed interface Poll {
 }
 
 @Serializable(PollSerializer::class)
-sealed interface MultipleAnswersPoll : Poll
+sealed interface MultipleAnswersPoll : Poll {
+    val allowMultipleAnswers: Boolean
+}
 
 @Serializable
 private class RawPoll(
@@ -122,7 +124,7 @@ data class RegularPoll(
     override val votesCount: Int,
     override val isClosed: Boolean = false,
     override val isAnonymous: Boolean = false,
-    val allowMultipleAnswers: Boolean = false,
+    override val allowMultipleAnswers: Boolean = false,
     override val scheduledCloseInfo: ScheduledCloseInfo? = null
 ) : MultipleAnswersPoll