Update yarn.lock to secure version. (#993)

yarn.lock

@@ -9630,10 +9630,10 @@ pbkdf2@^3.0.3:
     safe-buffer "^5.0.1"
     sha.js "^2.4.8"
 
-pdfjs-dist@^2.4.456:
-  version "2.4.456"
-  resolved "https://registry.yarnpkg.com/pdfjs-dist/-/pdfjs-dist-2.4.456.tgz#0eaad2906cda866bbb393e79a0e5b4e68bd75520"
-  integrity sha512-yckJEHq3F48hcp6wStEpbN9McOj328Ib09UrBlGAKxvN2k+qYPN5iq6TH6jD1C0pso7zTep+g/CKsYgdrQd5QA==
+pdfjs-dist@^2.9.359:
+  version "2.9.359"
+  resolved "https://registry.yarnpkg.com/pdfjs-dist/-/pdfjs-dist-2.9.359.tgz#e67bafebf20e50fc41f1a5c189155ad008ac4f81"
+  integrity sha512-P2nYtkacdlZaNNwrBLw1ZyMm0oE2yY/5S/GDCAmMJ7U4+ciL/D0mrlEC/o4HZZc/LNE3w8lEVzBEyVgEQlPVKQ==
 
 peek-readable@^3.1.0:
   version "3.1.0"