Updating AR Foundation packages to 3.1.0-preview.4. Updating Unity to 2019.2.19f1.

Assets/Scenes/ARCollaborationData/ARCollaborationDataExample.unity

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Assets/Scenes/Anchors.unity

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Assets/Scenes/LightEstimation/ARKitHDRLightEstimation.unity

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Assets/Scenes/LightEstimation/LightEstimation.unity

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Assets/Scenes/Scale.unity

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   m_Range: 10
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Packages/manifest.json

   "dependencies": {
     "com.unity.2d.sprite": "1.0.0",
     "com.unity.2d.tilemap": "1.0.0",
-    "com.unity.analytics": "3.3.4",
+    "com.unity.analytics": "3.3.5",
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+    "com.unity.ide.vscode": "1.1.4",
-    "com.unity.test-framework": "1.1.3",
+    "com.unity.test-framework": "1.1.9",
-    "com.unity.xr.arcore": "3.1.0-preview.2",
-    "com.unity.xr.arfoundation": "3.1.0-preview.3",
-    "com.unity.xr.arkit": "3.1.0-preview.2",
-    "com.unity.xr.arkit-face-tracking": "3.1.0-preview.2",
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+    "com.unity.xr.arkit": "3.1.0-preview.4",
+    "com.unity.xr.arkit-face-tracking": "3.1.0-preview.4",
     "com.unity.xr.legacyinputhelpers": "2.0.6",
     "com.unity.modules.ai": "1.0.0",
     "com.unity.modules.androidjni": "1.0.0",

ProjectSettings/EditorBuildSettings.asset

     path: Assets/Scenes/ImageTracking/ImageTracking.unity
     guid: e0b018a3c3b5cfd4c8e316706ec0a18c
   - enabled: 0
+    path: Assets/Scenes/LightEstimation/ARKitHDRLightEstimation.unity
+    guid: f7322e09f4047458fbc45af303830f01
+  - enabled: 0
     path: Assets/Scenes/LightEstimation/LightEstimation.unity
     guid: 2f0cbc82480584c258f99f0d9e4ba302
   - enabled: 0

ProjectSettings/ProjectVersion.txt

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-m_EditorVersionWithRevision: 2019.2.17f1 (8e603399ca02)
+m_EditorVersion: 2019.2.19f1
+m_EditorVersionWithRevision: 2019.2.19f1 (929ab4d01772)

ProjectSettings/QualitySettings.asset

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