Bump libp2p (#5079)

* Bump libp2p

* Switch to unstable

.gitmodules

@@ -24,7 +24,7 @@
 	path = vendor/nim-libp2p
 	url = https://github.com/status-im/nim-libp2p.git
 	ignore = untracked
-	branch = master
+	branch = unstable
 [submodule "vendor/nimbus-build-system"]
 	path = vendor/nimbus-build-system
 	url = https://github.com/status-im/nimbus-build-system.git

beacon_chain/networking/eth2_network.nim

@@ -2394,7 +2394,7 @@ proc createEth2Node*(rng: ref HmacDrbgContext,
     discovery = config.discv5Enabled, rng = rng)
 
   node.pubsub.subscriptionValidator =
-    proc(topic: string): bool {.gcsafe, raises: [Defect].} =
+    proc(topic: string): bool {.gcsafe, raises: [].} =
       topic in node.validTopics
 
   node
@@ -2431,7 +2431,7 @@ proc addValidator*[MsgType](node: Eth2Node,
   # or not - validation is `async` but implemented without the macro because
   # this is a performance hotspot.
   proc execValidator(topic: string, message: GossipMsg):
-      Future[ValidationResult] {.raises: [Defect].} =
+      Future[ValidationResult] {.raises: [].} =
     inc nbc_gossip_messages_received
     trace "Validating incoming gossip message", len = message.data.len, topic
 
@@ -2462,7 +2462,7 @@ proc addAsyncValidator*[MsgType](node: Eth2Node,
                             msgValidator: proc(msg: MsgType):
                             Future[ValidationResult] {.gcsafe, raises: [Defect].} ) =
   proc execValidator(topic: string, message: GossipMsg):
-      Future[ValidationResult] {.raises: [Defect].} =
+      Future[ValidationResult] {.raises: [].} =
     inc nbc_gossip_messages_received
     trace "Validating incoming gossip message", len = message.data.len, topic
 

vendor/nim-libp2p

@@ -1 +1 @@
-Subproject commit 95e98e8c51d57d041a9094b300cd884b35e87b95
+Subproject commit 49dfa84c6ffc8932aae03b64953ef1721d51a812