Add 1.20.2 - 1.20.5 to NMSVersion.java (PlaceholderAPI#1057)

Author: Andre601

src/main/java/me/clip/placeholderapi/expansion/NMSVersion.java

@@ -47,7 +47,10 @@ public enum NMSVersion {
   SPIGOT_1_19_R1("v1_19_R1"),
   SPIGOT_1_19_R2("v1_19_R2"),
   SPIGOT_1_19_R3("v1_19_R3"),
-  SPIGOT_1_20_R1("v1_20_R1");
+  SPIGOT_1_20_R1("v1_20_R1"),
+  SPIGOT_1_20_R2("v1_20_R2"),
+  SPIGOT_1_20_R3("v1_20_R3"),
+  SPIGOT_1_20_R4("v1_20_R4");
 
   private final String version;