Bump platform-api from 3.5.0 to 3.6.0

Bumps [platform-api](https://github.com/heroku/platform-api) from 3.5.0 to 3.6.0.
- [Changelog](https://github.com/heroku/platform-api/blob/master/CHANGELOG.md)
- [Commits](heroku/platform-api@v3.5.0...v3.6.0)

---
updated-dependencies:
- dependency-name: platform-api
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -228,7 +228,7 @@ GEM
     exception_notification (4.5.0)
       actionmailer (>= 5.2, < 8)
       activesupport (>= 5.2, < 8)
-    excon (0.99.0)
+    excon (0.109.0)
     execjs (2.9.1)
     factory_bot (6.4.2)
       activesupport (>= 5.0.0)
@@ -403,7 +403,7 @@ GEM
     parser (3.0.0.0)
       ast (~> 2.4.1)
     phantomjs (2.1.1.0)
-    platform-api (3.5.0)
+    platform-api (3.6.0)
       heroics (~> 0.1.1)
       moneta (~> 1.0.0)
       rate_throttle_client (~> 0.1.0)