Init push of 2019.2 branch

Packages/manifest.json

     "com.unity.burst": "1.0.4",
     "com.unity.cinemachine": "2.3.4",
     "com.unity.mathematics": "1.0.1",
-    "com.unity.package-manager-ui": "2.1.2",
-    "com.unity.render-pipelines.lightweight": "5.8.1",
+    "com.unity.package-manager-ui": "2.2.0",
+    "com.unity.render-pipelines.lightweight": "6.7.1",
-    "com.unity.timeline": "1.0.0",
+    "com.unity.timeline": "1.1.0",
+    "com.unity.ugui": "1.0.0",
+    "com.unity.modules.androidjni": "1.0.0",
     "com.unity.modules.animation": "1.0.0",
     "com.unity.modules.audio": "1.0.0",
     "com.unity.modules.director": "1.0.0",

ProjectSettings/ProjectVersion.txt

-m_EditorVersion: 2019.1.0f2
-m_EditorVersionWithRevision: 2019.1.0f2 (292b93d75a2c)
+m_EditorVersion: 2019.2.0b4
+m_EditorVersionWithRevision: 2019.2.0b4 (243498937c5d)