Update stuff, fix jassub font issue

src/types/source.ts

@@ -14,7 +14,7 @@ export interface VideoSrc {
 	mimeType?: string;
 	// header sends with xhr requests (especially useful for HLS)
 	// might not be available depending on browser/platform.
-	headers: Record<string, string>;
+	headers: Record<string, string | undefined>;
 }
 
 export interface Subtitle {

src/view.web.tsx

@@ -108,7 +108,7 @@ export const OmniView = ({
 			hlsJs: {
 				xhrSetup: (xhr: XMLHttpRequest) => {
 					for (const [key, value] of Object.entries(headers)) {
-						xhr.setRequestHeader(key, value);
+						if (value) xhr.setRequestHeader(key, value);
 					}
 				},
 			},