working on update checking

source/funkin/github/GitHubException.hx

@@ -0,0 +1,15 @@
+package funkin.github;
+
+import haxe.Exception;
+
+class GitHubException extends Exception {
+    public var apiMessage:String;
+
+    public var documentationUrl:String;
+
+    public function new(apiMessage:String, documentationUrl:String) {
+        super('[GitHubException] ${apiMessage} (Check ${documentationUrl})');
+        this.apiMessage = apiMessage;
+        this.documentationUrl = documentationUrl;
+    }
+}