v0.0.121

v0.0.121 - Jan 22, 2024 - "Unwraps are Bad"

Bug Fixes
=========
 * Fix a deadlock when calling `batch_funding_transaction_generated` with
   invalid input (#2841).

Security
========
0.0.121 fixes a denial-of-service vulnerability which is reachable from
untrusted input from peers in rare cases if we have a public channel or in
common cases if `P2PGossipSync` is used.
 * A peer that failed to complete its handshake would cause a reachable
   `unwrap` in LDK since 0.0.119 when LDK attempts to broadcast gossip to all
   peers (#2842).

In total, this release features 4 files changed, 52 insertions, 10
deletions in 4 commits from 2 authors, in alphabetical order:
 * Jeffrey Czyz
 * Matt Corallo
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