Update changelog (#53)

Update CHANGELOG before the 0.5.0 release.

CHANGELOG.md

@@ -1,22 +1,21 @@
 # astro changelog
 
-## 0.5.0 (UNRELEASED, 2019)
+## 0.5.0 (October 3, 2019)
 
-* Add `version` command (#12)
-* Add binaries via goreleaser (#14)
+### Added
+* Support Terraform 0.12 (#45 #41)
+* Propagate SIGINT/SIGTERM to Terraform on shut down (avoid state locks) (#49)
+* Add `ls` command to tvm (#37)
+* Add `version` command to astro (#12)
+* Use goreleaser and github actions to make a release (#14 #50)
+* Add Travis configuration, `make lint` and git precommit hook (#13)
+
+### Changed
 * Adopt options pattern for `astro.NewProject` constructor (#26)
-* Refactor and improve integration tests to invoke them directly using cli
-  rather than `os.exec` (#26)
-* Add Travis configuration, `make lint` and git precommit hook
-* Fix `--help` displaying "pflag: help requested" (#1)
-* Fix issue with make not recompiling when source files changed
-* Fix issue with `make test` always returning true even when tests fail
-* Fix race condition that could cause failures due to astro downloading the
-  same version of Terraform twice
-* Fix module execution errors being printed to the console twice
-* Remove godep and move to Go modules (vgo)
+* Refactor and improve integration tests to invoke them directly using cli (#26)
+* Remove godep and move to Go modules (vgo) (#15)
 * Change configuration syntax for remapping CLI flags to Terraform module
-  variables
+  variables (#21)
 
 **Breaking changes:**
 
@@ -36,6 +35,19 @@
   `astro.NewProject(conf)` should be changed to:
   `astro.NewProject(astro.WithConfig(conf))`
 
+### Security
+* Fix zip slip vulnerability in tvm (#47)
+
+### Fixed
+* Don't pass variables to the modules that don't declare them (#40)
+* Fix bug in initialization of allowed values (#43)
+* Fix `--help` displaying "pflag: help requested" (#1)
+* Fix issue with make not recompiling when source files changed
+* Fix issue with `make test` always returning true even when tests fail
+* Fix race condition that could cause failures due to astro downloading the
+  same version of Terraform twice
+* Fix module execution errors being printed to the console twice (#36)
+
 ## 0.4.1 (October 3, 2018)
 
 * Output policy changes in unified diff format (#2)