Upgrading to Unity 2019.4.5f1.

ProjectSettings/ProjectVersion.txt

-m_EditorVersion: 2019.4.4f1
-m_EditorVersionWithRevision: 2019.4.4f1 (1f1dac67805b)
+m_EditorVersion: 2019.4.5f1
+m_EditorVersionWithRevision: 2019.4.5f1 (81610f64359c)