Added first integration of PKPass file

src/PKPass.ts

@@ -0,0 +1,23 @@
+import { Certificates } from "../lib/schemas";
+import { default as Bundle, filesSymbol } from "./Bundle";
+
+interface NamedBuffers {
+	[key: string]: Buffer;
+}
+
+export class PKPass extends Bundle {
+	constructor(buffers: NamedBuffers, certificates: Certificates) {
+		super("application/vnd.apple.pkpass");
+
+		const buffersEntries = Object.entries(buffers);
+
+		for (
+			let i = buffersEntries.length, buffer: [string, Buffer];
+			(buffer = buffersEntries[--i]);
+
+		) {
+			const [fileName, contentBuffer] = buffer;
+			this.addBuffer(fileName, contentBuffer);
+		}
+	}
+}