Put API requirements into config files

Author: tastybento

src/main/resources/addon.yml

@@ -4,7 +4,7 @@ version: ${version}${build.number}
 metrics: true
 repository: "BentoBoxWorld/SkyGrid"
 icon: "COBWEB"
-api-version: 2.4.1
+api-version: 2.7.1
 
 authors: tastybento
 

src/main/resources/plugin.yml

@@ -1,7 +1,7 @@
 name: BentoBox-SkyGrid
 main: world.bentobox.skygrid.SkyGridPladdon
 version: ${project.version}${build.number}
-api-version: "1.19"
+api-version: "1.21"
 
 authors: [tastybento]
 contributors: ["The BentoBoxWorld Community"]