Bump waste_exemptions_engine from ad29a5b to fa118f0 (#299)

Bumps [waste_exemptions_engine](https://github.com/DEFRA/waste-exemptions-engine) from `ad29a5b` to `fa118f0`.
- [Release notes](https://github.com/DEFRA/waste-exemptions-engine/releases)
- [Commits](DEFRA/waste-exemptions-engine@ad29a5b...fa118f0)

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

Gemfile.lock

@@ -8,7 +8,7 @@ GIT
 
 GIT
   remote: https://github.com/DEFRA/waste-exemptions-engine
-  revision: ad29a5bbf95ae6b2203f010196a1688df5a2c672
+  revision: fa118f0e839b22c7d0b2ba221e15046d9967a2dc
   branch: master
   specs:
     waste_exemptions_engine (0.0.1)