Add type definitions

Author: yusitnikov

fix-webm-duration.d.ts

@@ -0,0 +1,15 @@
+export type LoggerCallback = (message: string) => void;
+
+export interface Options {
+    logger?: LoggerCallback | false;
+}
+
+export type ResultCallback = (fixedBlob: Blob) => void;
+
+export interface FixWebmDurationFunction {
+    (blob: Blob, duration: number, callback: ResultCallback, options?: Options): void;
+    (blob: Blob, duration: number, options?: Options): Promise<Blob>;
+}
+
+declare const fixWebmDuration: FixWebmDurationFunction;
+export default fixWebmDuration;