🧹 Clean up the gradle build scripts a little

Changes:
- Move all dependency versions to a shared file
- Order the projects in settings.gradle

scripts/dependencies.gradle

@@ -0,0 +1,21 @@
+ext {
+    vers = [
+            'checker-qual'  : '3.7.0',
+            'geantyref'     : '1.3.11',
+            // DISCORD DEPENDENCIES
+            'javacord'      : '3.1.1',
+            'jda'           : '4.2.0_209',
+            // MINECRAFT DEPENDENCIES
+            'brigadier'     : '1.0.17',
+            'bukkit'        : '1.13.2-RO.1-SNAPSHOT',
+            'commodore'     : '1.9',
+            'bungeecord'    : '1.8-SNAPSHOT',
+            'cloudburst'    : '1.0.0-SNAPSHOT',
+            'adventure-api' : '4.1.1',
+            'paper-api'     : '1.15.2-R0.1-SNAPSHOT',
+            'velocity-api'  : '1.1.0-SNAPSHOT',
+            // TEST DEPENDENCIES
+            'jupiter-engine': '5.7.0',
+            'jhm'           : '1.25.2'
+    ]
+}