v12: add support for Node.js 18 (#14259)

* add .nvmrc to instruct NVM of preferred version

* update azure-pipelines.yml with node 18.16

* update "engines" section of package.json with preferred node.js 18.16

* update lockfiles in accordance with node 18 (lockfileVersion: 3)

Author: iOvergaard

build/azure-pipelines.yml

@@ -23,7 +23,7 @@ parameters:
     default: false
 
 variables:
-  nodeVersion: 16.17.0
+  nodeVersion: 18.16.0
   dotnetVersion: 7.x
   dotnetIncludePreviewVersions: true
   solution: umbraco.sln

src/Umbraco.Web.UI.Client/.nvmrc

@@ -0,0 +1 @@
+18.16