Use packaged version of pdfjs-dist and adapt for worker-loader 3 api

debian/control

@@ -392,6 +392,7 @@ Depends: ${shlibs:Depends}, ${misc:Depends},
  node-lodash (>= 4.17.15~),
  node-marked (>= 0.3~),
  node-mousetrap,
+ node-pdfjs-dist,
 # Include node-pikaday only after @gitlab/ui is accepted
 # node-pikaday,
  node-popper.js,

debian/patches/0740-use-packaged-modules.patch

@@ -121,7 +121,7 @@ Use debian packaged node modules when available
      "diff": "^3.4.0",
      "document-register-element": "1.14.3",
      "dompurify": "^2.0.11",
-@@ -85,81 +62,55 @@
+@@ -85,81 +62,54 @@
      "editorconfig": "^0.15.3",
      "emoji-regex": "^7.0.3",
      "emoji-unicode-version": "^0.2.1",
@@ -160,7 +160,7 @@ Use debian packaged node modules when available
      "monaco-editor-webpack-plugin": "^1.9.0",
      "monaco-yaml": "^2.4.1",
 -    "mousetrap": "1.6.5",
-     "pdfjs-dist": "^2.0.943",
+-    "pdfjs-dist": "^2.0.943",
      "pikaday": "^1.8.0",
 -    "popper.js": "^1.16.1",
 -    "prismjs": "^1.21.0",
@@ -222,3 +222,13 @@ Use debian packaged node modules when available
    // See: https://gitlab.com/gitlab-org/gitlab/-/issues/229146
    '@babel/plugin-transform-arrow-functions',
    'lodash',
+--- a/app/assets/javascripts/pdf/index.vue
++++ b/app/assets/javascripts/pdf/index.vue
+@@ -1,6 +1,6 @@
+ <script>
+ import pdfjsLib from 'pdfjs-dist/build/pdf';
+-import workerSrc from 'pdfjs-dist/build/pdf.worker.min';
++import workerSrc from 'pdfjs-dist/build/pdf.worker';
+ 
+ import page from './page/index.vue';
+ 

debian/patches/0790-worker-loader-3.patch

@@ -0,0 +1,24 @@
+From d074f685027a6a8b03bcaaf1f0cb2ff08c167dc9 Mon Sep 17 00:00:00 2001
+From: Pirate Praveen <praveen@debian.org>
+Date: Sun, 6 Dec 2020 18:24:33 +0000
+Subject: [PATCH] Update worker-loader from 2.x to 3.x
+
+---
+ config/webpack.config.js |  4 ++--
+ package.json             |  2 +-
+ yarn.lock                | 46 ++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 49 insertions(+), 3 deletions(-)
+
+--- a/config/webpack.config.js
++++ b/config/webpack.config.js
+@@ -230,8 +230,8 @@
+           {
+             loader: 'worker-loader',
+             options: {
+-              name: '[name].[contenthash:8].worker.js',
+-              inline: IS_DEV_SERVER,
++              filename: '[name].[contenthash:8].worker.js',
++              inline: "fallback",
+             },
+           },
+           'babel-loader',

debian/patches/series

@@ -30,3 +30,4 @@
 0770-remove-rubocop-rspec.patch
 0770-remove-capybara-screenshot-rspec.patch
 0780-css-loader-3.patch
+0790-worker-loader-3.patch