Add Unreleased entries to Changelog

Author: mmlb

CHANGELOG.md

@@ -4,6 +4,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 This project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## Unreleased
+### Added
+- Integration tests are only run if `PACKET_PYTHON_TEST_ACTUAL_API` envvar is set
+- Rescue action and along with test
+- Missing SPDX and source encoding meta comments
+### Removed
+- Use of Travis CI
+
 ## [1.39.1] - 2019-09-17
 ### Added
 - Support for `hardware_reservation_id`