Release v0.37.4 (cometbft#1699)

* version: Bump version to v0.37.4

* Add changelog entry

* unclog release

* unclog build

* Format changelog summary (line wrap)

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Add note about reverting minimum Go version change

Signed-off-by: Thane Thomson <connect@thanethomson.com>

* Build changelog

Signed-off-by: Thane Thomson <connect@thanethomson.com>

---------

Signed-off-by: Thane Thomson <connect@thanethomson.com>
Co-authored-by: Thane Thomson <connect@thanethomson.com>

.changelog/v0.37.4/bug-fixes/1654-semaphore-wait.md

@@ -0,0 +1,3 @@
+- `[mempool]` Avoid infinite wait in transaction sending routine when
+  using experimental parameters to limiting transaction gossiping to peers
+  ([\#1654](https://github.com/cometbft/cometbft/pull/1654))

.changelog/v0.37.4/summary.md

@@ -0,0 +1,9 @@
+*November 27, 2023*
+
+This release provides the **nop** mempool for applications that want to build
+their own mempool. Using this mempool effectively disables all mempool
+functionality in CometBFT, including transaction dissemination and the
+`broadcast_tx_*` endpoints.
+
+Also fixes a small bug in the mempool for an experimental feature, and reverts
+the change from v0.37.3 that bumped the minimum Go version to v1.21.

CHANGELOG.md

@@ -1,5 +1,43 @@
 # CHANGELOG
 
+## v0.37.4
+
+*November 27, 2023*
+
+This release provides the **nop** mempool for applications that want to build
+their own mempool. Using this mempool effectively disables all mempool
+functionality in CometBFT, including transaction dissemination and the
+`broadcast_tx_*` endpoints.
+
+Also fixes a small bug in the mempool for an experimental feature, and reverts
+the change from v0.37.3 that bumped the minimum Go version to v1.21.
+
+### BUG FIXES
+
+- `[mempool]` Avoid infinite wait in transaction sending routine when
+  using experimental parameters to limiting transaction gossiping to peers
+  ([\#1654](https://github.com/cometbft/cometbft/pull/1654))
+
+### FEATURES
+
+- `[mempool]` Add `nop` mempool ([\#1643](https://github.com/cometbft/cometbft/pull/1643))
+
+  If you want to use it, change mempool's `type` to `nop`:
+
+  ```toml
+  [mempool]
+
+  # The type of mempool for this node to use.
+  #
+  # Possible types:
+  # - "flood" : concurrent linked list mempool with flooding gossip protocol
+  # (default)
+  # - "nop"   : nop-mempool (short for no operation; the ABCI app is responsible
+  # for storing, disseminating and proposing txs). "create_empty_blocks=false"
+  # is not supported.
+  type = "nop"
+  ```
+
 ## v0.37.3
 
 *November 17, 2023*

version/version.go

@@ -5,7 +5,7 @@ const (
 	// The default version of TMCoreSemVer is the value used as the
 	// fallback version of CometBFT when not using git describe.
 	// It is formatted with semantic versioning.
-	TMCoreSemVer = "0.37.3"
+	TMCoreSemVer = "0.37.4"
 	// ABCISemVer is the semantic version of the ABCI protocol
 	ABCISemVer  = "1.0.0"
 	ABCIVersion = ABCISemVer