use `nim-websock` instead of `news` (#4061)

`news` has a few open issues that are not present in `nim-websock`:
1. There is a 1 second delay between each MB of sent data.
2. Cancelling an ongoing `send` makes the entire WebSocket unusable.
3. Control packets do not have priority over ongoing message frames.

Using `news`, there are quite a few of these messages in Geth:
```
Previously seen beacon client is offline. Please ensure it is
operational to follow the chain!
```
It may take quite some time to reconnect when this happens.

Using `nim-websock`, this message still occurs because `eth1_monitor`
reconnects the EL connection when no new blocks occurred for 5 minutes,
but reconnecting is quick and the message is rarer.

.gitignore

@@ -48,6 +48,8 @@ build/
 
 test_keymanager_api
 
+/libnfuzz_linkerArgs.txt
+
 # Prometheus db
 /data
 # Grafana dashboards

.gitmodules

@@ -103,11 +103,6 @@
 	url = https://github.com/status-im/nim-json-rpc.git
 	ignore = untracked
 	branch = master
-[submodule "vendor/news"]
-	path = vendor/news
-	url = https://github.com/status-im/news.git
-	ignore = untracked
-	branch = status
 [submodule "vendor/nim-unicodedb"]
 	path = vendor/nim-unicodedb
 	url = https://github.com/nitely/nim-unicodedb.git

beacon_chain/eth1/deposit_contract.nim.cfg

@@ -0,0 +1 @@
+-d:"json_rpc_websocket_package=websock"

beacon_chain/nimbus_beacon_node.nim.cfg

@@ -5,3 +5,5 @@
 @if release:
   -d:"chronicles_line_numbers:0"
 @end
+
+-d:"json_rpc_websocket_package=websock"

beacon_chain/nimbus_light_client.nim.cfg

@@ -5,3 +5,5 @@
 @if release:
   -d:"chronicles_line_numbers:0"
 @end
+
+-d:"json_rpc_websocket_package=websock"

beacon_chain/nimbus_validator_client.nim.cfg

@@ -5,3 +5,5 @@
 @if release:
   -d:"chronicles_line_numbers:0"
 @end
+
+-d:"json_rpc_websocket_package=websock"

research/block_sim.nim.cfg

@@ -1 +1,3 @@
 -d:"chronicles_sinks=json[file(block_sim.log)]"
+
+-d:"json_rpc_websocket_package=websock"

tests/nim.cfg

@@ -1,6 +1,8 @@
 # Use only `secp256k1` public key cryptography as an identity in LibP2P.
 -d:"libp2p_pki_schemes=secp256k1"
 
+-d:"json_rpc_websocket_package=websock"
+
 -d:chronosStrictException
 --styleCheck:usages
 --styleCheck:hint

vendor/news

@@ -1 +0,0 @@
-Subproject commit 34272dedcd2586ba5b374a87c1f6d1adc6835049

vendor/nim-json-rpc

@@ -1 +1 @@
-Subproject commit d618b555e791a4b1112a2fb1ca1c5c52960f0ae7
+Subproject commit c8cbe08de756d65e7d085c409dfcb5edfba4aa5d

vendor/nim-websock

@@ -1 +1 @@
-Subproject commit 8a72c0f7690802753b1d59887745b1ce1f0c8b3d
+Subproject commit 7b2ed397d6e4c37ea4df08ae82aeac7ff04cd180