fix(lazer/sui): lock down ctors

Author: tejasbadadare

lazer/contracts/sui/sources/feed.move

@@ -34,7 +34,7 @@ public struct Feed has copy, drop {
 }
 
 /// Create a new Feed with the specified parameters
-public fun new(
+public(package) fun new(
     feed_id: u32,
     price: Option<Option<I64>>,
     best_bid_price: Option<Option<I64>>,

lazer/contracts/sui/sources/update.move

@@ -3,18 +3,13 @@ module pyth_lazer::update;
 use pyth_lazer::channel::Channel;
 use pyth_lazer::feed::Feed;
 
-// public struct UpdateObject has key, store {
-//     id: UID,
-//     update: Update
-// }
-
 public struct Update has copy, drop {
     timestamp: u64,
     channel: Channel,
     feeds: vector<Feed>,
 }
 
-public fun new(
+public(package) fun new(
     timestamp: u64,
     channel: Channel,
     feeds: vector<Feed>