-Removed Timeline from package dependencies (was causing compilation error)

-Updated to 2019.2.17f1

Packages/manifest.json

     "com.unity.purchasing": "2.0.6",
     "com.unity.test-framework": "1.1.3",
     "com.unity.textmeshpro": "2.0.1",
-    "com.unity.timeline": "1.2.9",
     "com.unity.ugui": "1.0.0",
     "com.unity.xr.arcore": "3.1.0-preview.2",
     "com.unity.xr.arfoundation": "3.1.0-preview.3",

ProjectSettings/GraphicsSettings.asset

   - {fileID: 17000, guid: 0000000000000000f000000000000000, type: 0}
   - {fileID: 16000, guid: 0000000000000000f000000000000000, type: 0}
   - {fileID: 16001, guid: 0000000000000000f000000000000000, type: 0}
+  - {fileID: 16003, guid: 0000000000000000f000000000000000, type: 0}
   m_PreloadedShaders: []
   m_SpritesDefaultMaterial: {fileID: 10754, guid: 0000000000000000f000000000000000,
     type: 0}

ProjectSettings/ProjectSettings.asset

   switchRatingsInt_9: 0
   switchRatingsInt_10: 0
   switchRatingsInt_11: 0
+  switchRatingsInt_12: 0
   switchLocalCommunicationIds_0: 
   switchLocalCommunicationIds_1: 
   switchLocalCommunicationIds_2: 

ProjectSettings/ProjectVersion.txt

-m_EditorVersion: 2019.2.12f1
-m_EditorVersionWithRevision: 2019.2.12f1 (b1a7e1fb4fa5)
+m_EditorVersion: 2019.2.17f1
+m_EditorVersionWithRevision: 2019.2.17f1 (8e603399ca02)