Fix TypeScript type errors across multiple files

src/declaration.d.ts

@@ -16,3 +16,18 @@ declare module 'semver';
 declare module 'tsup';
 declare module 'uuid';
 declare module '@umami/esbuild-plugin-css-modules';
+
+interface UmamiTracker {
+  track: {
+    (): Promise<string>;
+    (eventName: string): Promise<string>;
+    (eventName: string, obj: Record<string, any>): Promise<string>;
+    (properties: Record<string, any>): Promise<string>;
+    (eventFunction: (props: Record<string, any>) => Record<string, any>): Promise<string>;
+  };
+  identify: (data: Record<string, any>) => Promise<string>;
+}
+
+interface Window {
+  umami: UmamiTracker;
+}