Upgrade dependencies.

pom.xml

@@ -58,12 +58,12 @@
         <!-- Non-minecraft related dependencies -->
         <powermock.version>2.0.2</powermock.version>
         <!-- SPIGOT API version -->
-        <spigot.version>1.16.4-R0.1-SNAPSHOT</spigot.version>
+        <spigot.version>1.20-R0.1-SNAPSHOT</spigot.version>
         <!-- Vault API version -->
         <vault.version>1.7</vault.version>
 
         <!-- BentoBox API version -->
-        <bentobox.version>1.20.0</bentobox.version>
+        <bentobox.version>2.0.0-SNAPSHOT</bentobox.version>
         <!-- Warps addon version -->
         <warps.version>1.12.0</warps.version>
         <!-- Visit addon version -->
@@ -73,7 +73,7 @@
         <!-- Likes addon version -->
         <likes.version>2.1.1</likes.version>
         <!-- Panel Utils version -->
-        <panelutils.version>1.0.0</panelutils.version>
+        <panelutils.version>1.2.0</panelutils.version>
         <!-- Revision variable removes warning about dynamic version -->
         <revision>${build.version}-SNAPSHOT</revision>
         <!-- This allows to change between versions and snapshots. -->