[microsoft-signalr] Update port (#19420)

* Update microsoft-signalr port

* x-add-version

ports/microsoft-signalr/CONTROL

@@ -1,5 +1,5 @@
 Source: microsoft-signalr
-Version: 0.1.0-alpha2
+Version: 0.1.0-alpha3
 Port-Version: 0
 Description: C++ Client for ASP.NET Core SignalR.
 Default-Features: default-features
@@ -11,4 +11,8 @@ Description: Features installed by default
 
 Feature: cpprestsdk
 Description: Add default Http and WebSocket implementations using CppRestSDK
-Build-Depends: cpprestsdk[default-features,websockets]
+Build-Depends: cpprestsdk[default-features,websockets]
+
+Feature: messagepack
+Description: Add support for the messagepack hub protocol, must enable in code still
+Build-Depends: msgpack

ports/microsoft-signalr/portfile.cmake

@@ -1,8 +1,8 @@
 vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO aspnet/SignalR-Client-Cpp
-    REF v0.1.0-alpha2
-    SHA512 5a25bdf1f4587c7c008b743c0e97c5b293839b4a63bad89b3c37a1affccfa26df12b20f69a822e8d0eddb4491b3f0e513f017c39528a39990527aac44b3d6f5b
+    REF v0.1.0-alpha3
+    SHA512 7dbd75748535c7b7fef36afe246b132b243b8b4932c218a63aa18c7a44d6691c002144c6d2f5603ad63c03d018907436ad259fdfcc0d7749917931bdebef670b
     HEAD_REF main
 )
 
@@ -10,6 +10,7 @@ vcpkg_check_features(
     OUT_FEATURE_OPTIONS FEATURE_OPTIONS
     FEATURES
         cpprestsdk USE_CPPRESTSDK
+        messagepack USE_MSGPACK
 )
 
 if("cpprestsdk" IN_LIST FEATURES AND VCPKG_TARGET_IS_UWP)

versions/baseline.json

@@ -4069,7 +4069,7 @@
       "port-version": 0
     },
     "microsoft-signalr": {
-      "baseline": "0.1.0-alpha2",
+      "baseline": "0.1.0-alpha3",
       "port-version": 0
     },
     "mikktspace": {

versions/m-/microsoft-signalr.json

@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "4d840951b02dde36c320872fb7e64c1e89e7aa7d",
+      "version-string": "0.1.0-alpha3",
+      "port-version": 0
+    },
     {
       "git-tree": "6035b3729564e1a85d60cc322d5dda0ea16d858d",
       "version-string": "0.1.0-alpha2",