This plugin has now been updated to 1.13.2 and will work with WorldGuard 7. New features:

• Instead of data values, there are now growth states. You can put, for example, "wheat:true" in the blocks list and it will only allow the reward to happen if it is fully grown wheat. Similarly, if you put "wheat:false", it will only allow it to happen with wheat that isn't fully grown yet. As before, if you just put "wheat" it will register for any growth stage of wheat.
• Duplicate blocks are now managed and filtered properly. Still don't put duplicate blocks in, but the plugin will handle them if you do. If you use the /cmr addblock command, it will prevent you from adding duplicate blocks. If, for some reason, you REALLY want to, you can add it in the config file but it WILL bug you to fix it. Keep in mind that "wheat" would do the same thing as "wheat:true" and "wheat:false" in the same list.
• Added more control of log verbosity. Regenerate your config to use this option. Alternatively, add "verbosity: 1" to your config file, without quotes. 1 is regular logging, logs only errors and commands executed. 0 is minimal logging, only logs errors. 2 is maximum logging, will spam you with every rewarding block break for debugging purposes.
• Other bug fixes and such.

Please report any bugs in discussion tab or PM me!