Update Environment

src/main/java/xyz/jpenilla/pluginbase/legacy/Environment.java

@@ -25,7 +25,15 @@ public class Environment {
                 final Class<?> sharedConstants = Class.forName("net.minecraft.SharedConstants");
                 final Method getCurrentVersion = sharedConstants.getDeclaredMethod("getCurrentVersion");
                 final Object currentVersion = getCurrentVersion.invoke(null);
-                final Method getName = currentVersion.getClass().getDeclaredMethod("getName");
+				Method getName = null;
+				try {
+					getName = currentVersion.getClass().getDeclaredMethod("getName");
+				} catch (final NoSuchMethodException ignored) {
+				}
+				if (getName == null) {
+					// ~1.21.6+
+					getName = currentVersion.getClass().getDeclaredMethod("name");
+				}
                 final String versionName = (String) getName.invoke(currentVersion);
                 majorVer = Integer.parseInt(versionName.split("\\.")[1]);
             } catch (final ReflectiveOperationException ex) {