update pdfjs to v1.8.188

services/web/app/coffee/infrastructure/PackageVersions.coffee

@@ -1,5 +1,5 @@
 version = {
-	"pdfjs": "1.7.225"
+	"pdfjs": "1.8.188"
 	"moment": "2.9.0"
 	"ace": "1.2.5"
 }