proto: add ChannelCommitUpdate to channel event updates

lnrpc/lightning.swagger.json

@@ -3125,7 +3125,8 @@
         "INACTIVE_CHANNEL",
         "PENDING_OPEN_CHANNEL",
         "FULLY_RESOLVED_CHANNEL",
-        "CHANNEL_FUNDING_TIMEOUT"
+        "CHANNEL_FUNDING_TIMEOUT",
+        "CHANNEL_UPDATE"
       ],
       "default": "OPEN_CHANNEL"
     },
@@ -4478,6 +4479,14 @@
         }
       }
     },
+    "lnrpcChannelCommitUpdate": {
+      "type": "object",
+      "properties": {
+        "channel": {
+          "$ref": "#/definitions/lnrpcChannel"
+        }
+      }
+    },
     "lnrpcChannelConstraints": {
       "type": "object",
       "properties": {
@@ -4609,6 +4618,9 @@
         "channel_funding_timeout": {
           "$ref": "#/definitions/lnrpcChannelPoint"
         },
+        "updated_channel": {
+          "$ref": "#/definitions/lnrpcChannelCommitUpdate"
+        },
         "type": {
           "$ref": "#/definitions/ChannelEventUpdateUpdateType"
         }