Draft: Resolve "[Document Sealing] Implement PDF parser"

Closes #1

dist/lib/signatureUtils.d.ts

@@ -10,4 +10,3 @@ export declare const extractSignature: (pdf: any) => {
     }[];
 };
 export declare const getMessageFromSignature: (signature: any) => any;
-export declare const authenticateSignature: (certs: any) => boolean;