API Changelog 4.0.20 (linode#234)

* API Changelog 4.0.20

* Changes from feedback

- Removed mentions of toronto checks
- improved clarity on reserved IPs addition to /linodes/instances/:id/ips

* Added sequence and logo_url to StackScripts

Author: astevens

content/changelog/2019/04-08-api.md

@@ -0,0 +1,17 @@
+---
+title: "4.0.20: 2019-04-08"
+date: "2019-04-08T08:00:00-04:00"
+description: "API Changelog  4.0.20"
+changelog:
+- API
+version: 4.0.20
+---
+
+### Added
+
+- Added a "reserved" section to the GET /linodes/instances/:id/ips endpoint that lists reserved IPs.
+- Added sequence and logo_url to StackScripts.
+
+### Fixed
+
+- Correctly resize disks created with a private image.