Bump waste_exemptions_engine from 9e4fd13 to f40ca17 (#560)

Bumps [waste_exemptions_engine](https://github.com/DEFRA/waste-exemptions-engine) from `9e4fd13` to `f40ca17`.
- [Release notes](https://github.com/DEFRA/waste-exemptions-engine/releases)
- [Commits](https://github.com/DEFRA/waste-exemptions-engine/compare/9e4fd13cbd808148c4005ea0d86c53a24e11a387...f40ca1736188ab6426605f132f333ae893ef63e0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Gemfile.lock

@@ -1,6 +1,6 @@
 GIT
   remote: https://github.com/DEFRA/waste-exemptions-engine
-  revision: 9e4fd13cbd808148c4005ea0d86c53a24e11a387
+  revision: f40ca1736188ab6426605f132f333ae893ef63e0
   branch: master
   specs:
     waste_exemptions_engine (0.0.1)