Bump com.palmergames.bukkit.towny:towny from 0.99.5.0 to 0.99.5.21

Bumps [com.palmergames.bukkit.towny:towny](https://github.com/TownyAdvanced/Towny) from 0.99.5.0 to 0.99.5.21.
- [Release notes](https://github.com/TownyAdvanced/Towny/releases)
- [Commits](TownyAdvanced/Towny@0.99.5.0...0.99.5.21)

---
updated-dependencies:
- dependency-name: com.palmergames.bukkit.towny:towny
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -97,7 +97,7 @@
         <dependency>
             <groupId>com.palmergames.bukkit.towny</groupId>
             <artifactId>towny</artifactId>
-            <version>0.99.5.0</version>
+            <version>0.99.5.21</version>
             <scope>provided</scope>
         </dependency>
         <dependency>