Added class to handle backwards compatibility

src/main/java/io/github/J0hnL0cke/egghunt/Model/Version.java

@@ -0,0 +1,58 @@
+package io.github.J0hnL0cke.egghunt.Model;
+
+import org.bukkit.Bukkit;
+
+/**
+ * Provides functionality related to backwards compatability
+ */
+public class Version {
+
+    private int majorVersion;
+
+    private boolean cavesAndCliffsPart1;
+    private boolean netherUpdate;
+
+    public Version(){
+        String version = Bukkit.getVersion();
+        majorVersion = Integer.parseInt(version.split(".")[1]);
+
+        cavesAndCliffsPart1 = majorVersion >= 17;
+        netherUpdate = majorVersion >= 16;
+    }
+
+    public boolean hasPortalCreate() {
+        return majorVersion >= 13;
+    }
+    
+    public boolean hasShulkers() {
+        return majorVersion >= 14;
+    }
+    
+    public boolean hasCustomWorlds() {
+        return cavesAndCliffsPart1;
+    }
+    
+    public boolean hasGlowFrames() {
+        return cavesAndCliffsPart1;
+    }
+
+    public boolean hasBundles() {
+        return cavesAndCliffsPart1;
+    }
+
+    public boolean hasDragonFight() {
+        return netherUpdate;
+    }
+    
+    public boolean hasLodestone() {
+        return netherUpdate;
+    }
+
+    public boolean hasAllays() {
+        return majorVersion >= 1.19;
+    }
+
+    public boolean hasCriteria() {
+        return majorVersion >= 20;
+    }
+}