Use coroutineContext from qq

mirai-core/src/commonMain/kotlin/net.mamoe.mirai/network/protocol/tim/packet/event/MemberJoin.kt

@@ -16,7 +16,6 @@ import net.mamoe.mirai.getQQ
 import net.mamoe.mirai.network.BotNetworkHandler
 import net.mamoe.mirai.utils.MiraiInternalAPI
 import net.mamoe.mirai.utils.io.discardExact
-import kotlin.coroutines.coroutineContext
 
 /**
  * 成员加入前的事件. 群的成员列表中还没有这个人
@@ -75,7 +74,8 @@ internal object MemberJoinPacketHandler : KnownEventParserAndHandler<MemberJoinE
         val group = bot.getGroup(readUInt())
 
         discardExact(1) // 01
-        val member = Member(bot.getQQ(readUInt()), group, MemberPermission.MEMBER, coroutineContext)
+        val qq = bot.getQQ(readUInt())
+        val member = Member(qq, group, MemberPermission.MEMBER, qq.coroutineContext)
 
         return if (readByte().toInt() == 0x03) {
             MemberJoinEventPacket(member, null)