chore(deps): update pdfjs-dist to 2.2.228

Author: MasterOdin

package-lock.json

@@ -54,7 +54,7 @@
     "karma-webpack": "^4.0.2",
     "lolex": "^5.1.1",
     "mocha": "^6.1.4",
-    "pdfjs-dist": "2.1.266",
+    "pdfjs-dist": "2.2.228",
     "sinon": "^7.3.2",
     "sinon-chai": "^3.3.0",
     "twitter-text": "^1.13.4",