[azure-security-keyvault-keys-cpp] Update to 4.2.0 (#20535)

## 4.2.0 (2021-10-05)

### Features Added

- [2833](https://github.com/Azure/azure-sdk-for-cpp/issues/2833) Added `GetCryptographyClient()` to `KeyClient` to return a `CryptographyClient` that uses the same options, policies, and pipeline as the `KeyClient` that created it.

ports/azure-security-keyvault-keys-cpp/portfile.cmake

@@ -1,8 +1,8 @@
 vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO Azure/azure-sdk-for-cpp
-    REF azure-security-keyvault-keys_4.1.0
-    SHA512 1292a7964a35ea97341f26e886f25a9ac11353105edcb45b074741564950f0bc7fcd4fc8be1cd9c68c645565c0248eb53cf7ca3d118bc3d32c29a32d7945a600
+    REF azure-security-keyvault-keys_4.2.0
+    SHA512 b7556019a23344c109f62120c9fc0451f81bf476700ef08c6968a3e731fa783522b2f9b4de411e6727cb1cb977cc4344303e32d825515c192544bb78d9517c32
 )
 
 vcpkg_cmake_configure(

ports/azure-security-keyvault-keys-cpp/vcpkg.json

@@ -1,6 +1,6 @@
 {
   "name": "azure-security-keyvault-keys-cpp",
-  "version-semver": "4.1.0",
+  "version-semver": "4.2.0",
   "description": [
     "Microsoft Azure Key Vault Keys SDK for C++",
     "This library provides Azure Key Vault Keys SDK."

versions/a-/azure-security-keyvault-keys-cpp.json

@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "c2a617f9326c712866be1e5218a1ae18262ee178",
+      "version-semver": "4.2.0",
+      "port-version": 0
+    },
     {
       "git-tree": "ee627e15fc96740b6d7d89fea0ef9bae6f24da5c",
       "version-semver": "4.1.0",

versions/baseline.json

@@ -333,7 +333,7 @@
       "port-version": 0
     },
     "azure-security-keyvault-keys-cpp": {
-      "baseline": "4.1.0",
+      "baseline": "4.2.0",
       "port-version": 0
     },
     "azure-security-keyvault-secrets-cpp": {