Prepare for 2.21.0 dev builds (#5467)

time for an adventure

README.md

@@ -77,7 +77,7 @@ To add EssentialsX to your build system, you should use the following artifacts:
 | Type           | Group ID          | Artifact ID   | Version           |
 |:---------------|:------------------|:--------------|:------------------|
 | Latest release | `net.essentialsx` | `EssentialsX` | `2.20.1`          |
-| Snapshots      | `net.essentialsx` | `EssentialsX` | `2.20.1-SNAPSHOT` |
+| Snapshots      | `net.essentialsx` | `EssentialsX` | `2.21.0-SNAPSHOT` |
 | Older releases | `net.ess3`        | `EssentialsX` | `2.18.2`          |
 
 Note: until version `2.18.2`, EssentialsX used the `net.ess3` group ID.  

build.gradle

@@ -3,7 +3,7 @@ plugins {
 }
 
 group = "net.essentialsx"
-version = "2.20.1"
+version = "2.21.0-SNAPSHOT"
 
 project.ext {
     GIT_COMMIT = !indraGit.isPresent() ? "unknown" : indraGit.commit().abbreviate(7).name()