Summary
Along with a small fix, this updates brings a PlaceholderAPI hook. You can now use placeholders in the title and description of a route point, which will be filled when the player sees it. ServerTours now also adds a couple of placeholders:
- %servertours_route%
- %servertours_point%
- %servertours_numpoints%
- %servertours_percent%

Complete changelog
- Made placeholders resolve in title and description of route points
- Added ServerTours placeholders
- Fixed "java.lang.NoSuchMethodException: java.util.Arrays$ArrayList.<init>()" with ProtocolLib v4.7.0
- Reduced JAR size (193kB -> 129kB, was accidentally including the javadoc in the jar lol)
- Switched build system to Gradle