TUN-8371: Bump quic-go to v0.42.0

## Summary
We discovered that we were being impacted by a bug in quic-go,
that could create deadlocks and not close connections.

This commit bumps quic-go to the version that contains the fix
to prevent that from happening.

vendor/go.uber.org/mock/mockgen/reflect.go

@@ -187,6 +187,7 @@ type reflectData struct {
 // gob encoding of a model.Package to standard output.
 // JSON doesn't work because of the model.Type interface.
 var reflectProgram = template.Must(template.New("program").Parse(`
+// Code generated by MockGen. DO NOT EDIT.
 package main
 
 import (