Merging 1.5-preview -> lwrp-support-2018.3-with-1.5.

Assets/Scripts/CameraConfigController.cs

     /// the selection in the UI.
     /// </summary>
     /// <param name="dropdown">The <c>Dropdown</c> which changed.</param>
-    public void OnValueChanged(Dropdown dropdown)
+    void OnDropdownValueChanged(Dropdown dropdown)
     {
         if ((cameraManager == null) || (cameraManager.subsystem == null) || !cameraManager.subsystem.running)
         {
     {
         m_Dropdown = GetComponent<Dropdown>();
         m_Dropdown.ClearOptions();
+        m_Dropdown.onValueChanged.AddListener(delegate { OnDropdownValueChanged(m_Dropdown); });
         m_ConfigurationNames = new List<string>();
     }
 

Packages/manifest.json

     "com.unity.shadergraph": "4.10.0-preview",
     "com.unity.subsystemregistration": "1.0.5",
     "com.unity.textmeshpro": "1.3.0",
-    "com.unity.xr.arcore": "2.1.0-preview.1",
+    "com.unity.xr.arcore": "2.1.0-preview.4",
-    "com.unity.xr.arkit": "2.1.0-preview.1",
-    "com.unity.xr.arkit-face-tracking": "1.0.0-preview.3",
+    "com.unity.xr.arkit": "2.1.0-preview.3",
+    "com.unity.xr.arkit-face-tracking": "1.0.0-preview.4",
     "com.unity.xr.arsubsystems": "2.1.0-preview.1",
     "com.unity.modules.ai": "1.0.0",
     "com.unity.modules.animation": "1.0.0",

ProjectSettings/ProjectVersion.txt

-m_EditorVersion: 2018.3.14f1
+m_EditorVersion: 2018.4.0f1