Implement prioritization in moq-pub (#74)

Here's the main change in webtransport-quinn 0.5.3:
ec553fa340

I haven't run into any errors so I don't know what was broken before
@englishm. I'm hoping that setting the stream priority to max when
writing the stream header avoids the issue? Otherwise we need to go bug
diving.

Cargo.lock

@@ -2139,9 +2139,9 @@ dependencies = [
 
 [[package]]
 name = "webtransport-quinn"
-version = "0.5.2"
+version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ea8dec60bceb5523139e095ff3ac4622ef0cffdd53f59fb68dd94f93f041ae4"
+checksum = "10cfc3592022726f4e8e5a536e68fb1ecb0b077e6b5435bd7ac3b9c97670c18c"
 dependencies = [
  "async-std",
  "bytes",

moq-pub/src/media.rs

@@ -258,7 +258,7 @@ impl Track {
 
 		// Compute the timestamp in milliseconds.
 		// Overflows after 583 million years, so we're fine.
-		let _timestamp: i32 = fragment
+		let timestamp: i32 = fragment
 			.timestamp(self.timescale)
 			.as_millis()
 			.try_into()
@@ -267,7 +267,7 @@ impl Track {
 		// Create a new segment.
 		let mut segment = self.track.create_segment(segment::Info {
 			sequence: VarInt::try_from(self.sequence).context("sequence too large")?,
-			priority: i32::MAX, // TODO
+			priority: timestamp, // newer segments are higher priority
 
 			// Delete segments after 10s.
 			expires: Some(time::Duration::from_secs(10)),

moq-transport/Cargo.toml

@@ -23,4 +23,4 @@ log = "0.4"
 indexmap = "2"
 
 quinn = "0.10"
-webtransport-quinn = "0.5.2"
+webtransport-quinn = "0.5.3"