Fix parse function return in shell-quote

Signed-off-by: Cameron Diver <cameron@balena.io>

types/shell-quote/index.d.ts

@@ -1,12 +1,19 @@
 // Type definitions for shell-quote 1.6
 // Project: https://github.com/substack/node-shell-quote
 // Definitions by: Jason Cheatham <https://github.com/jason0x43>
+//                 Cameron Diver <https://github.com/CameronDiver>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.2
 
+export type ParseEntry =
+	| string
+	| { op: string }
+	| { op: 'glob'; pattern: string }
+	| { comment: string };
+
 export function quote(args: string[]): string;
 export function parse(
 	cmd: string,
 	env?: { [key: string]: string } | ((key: string) => string | object),
 	opts?: { [key: string]: string }
-): string[];
+): ParseEntry[];