Issue #1918: Update CHANGELOG for 5.0.0 release. [ci skip]

CHANGELOG.md

@@ -1,6 +1,33 @@
 # Drupal VM Changelog
 
 
+## 5.0.0 "Flynn Lives" (2019-04-09)
+
+There are no major architectural changes in this release, which speaks to the current maturity of the Drupal VM platform; instead, this release focuses on updating all the default versions—most especially of the base OS to Ubuntu 18.04 'Bionic'. If you need to remain on Ubuntu 16.04 for now, please make sure you explicitly set `vagrant_box: geerlingguy/ubuntu1604` in your `config.yml`, or use a version of the `geerlingguy/drupal-vm` Vagrant box _older than_ `2.0.0`.
+
+### Breaking Changes
+
+ * #1881: Ubuntu 18.04 is now the defaul.t OS version (and is used in the `geerlingguy/drupal-vm` base image `2.0.0` and later)
+ * Ubuntu 14.04 is no longer supported.
+ * #1874: PHP 7.2 is now the default PHP version
+ * PHP 5.6 is no longer supported (though you may be able to install it for some time).
+ * #1885: Node.js 10.x is now the default Node.js version.
+ * Node.js 0.10, 0.12, 4.x, and 5.x are no longer supported (though you may be able to install some of them for some time).
+
+### New/changed variables in default.config.yml
+
+ * `php_version` changed from `7.1` to `7.2`
+ * `nodejs_version` changed from `6.x` to `10.x`
+
+### Improvements
+
+ * #1919: Ran out of songs from original Tron soundtrack; releases shall now be named after Tron: Legacy tracks.
+
+### Bugfixes
+
+ * #1895: Fixed typo in Drush docs.
+
+
 ## 4.9.2 (2019-01-03)
 
 ### Breaking Changes