fix bug and encore(extra) stage info temp impl.

gitadora@asphyxia/utils/extrastage.ts

@@ -0,0 +1,28 @@
+import { getVersion } from ".";
+
+interface EncoreStageData {
+    level: number
+    musics: number[]
+}
+
+export function getEncoreStageData(info: EamuseInfo): EncoreStageData {
+    const fallback = { level: 10, musics: [0] }
+    switch (getVersion(info)) {
+        case 'nextage':
+            return {
+                level: 7,
+                musics: [
+                    2587, 2531, 2612, 2622, 2686, 2631, 2624, 2666
+                ]
+            }
+        case 'exchain':
+            return {
+                level: 13,
+                musics: [
+                    2498, 2513, 2500, 2529, 2546, 2549, 2548, 2560, 2568, 2576, 5020, 5032, 5031, 5033
+                ]
+            }
+        default:
+            return fallback
+    }
+}

gitadora@asphyxia/utils/index.ts

@@ -16,4 +16,4 @@ export function isRequiredCoreVersion(major: number, minor: number) {
   const core_major = typeof CORE_VERSION_MAJOR === "number" ? CORE_VERSION_MAJOR : 1
   const core_minor = typeof CORE_VERSION_MINOR === "number" ? CORE_VERSION_MINOR : 18   
   return core_major >= major && core_minor >= minor
-}
+};