added pdf.js to add pdf support.

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "22569e29b4f8bd5fc837707e1c74a7425fadcc26ea7d25bdf000972446ea2f5e"
+            "sha256": "548d0f8003c2238f35176fd522fcca7d6108c2c9146f6cb0320660e6bb0212cc"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -25,11 +25,11 @@
         },
         "beautifulsoup4": {
             "hashes": [
-                "sha256:594ca51a10d2b3443cbac41214e12dbb2a1cd57e1a7344659849e2e20ba6a8d8",
-                "sha256:a4bbe77fd30670455c5296242967a123ec28c37e9702a8a81bd2f20a4baf0368",
-                "sha256:d4e96ac9b0c3a6d3f0caae2e4124e6055c5dcafde8e2f831ff194c104f0775a0"
+                "sha256:73cc4d115b96f79c7d77c1c7f7a0a8d4c57860d1041df407dd1aae7f07a77fd7",
+                "sha256:a6237df3c32ccfaee4fd201c8f5f9d9df619b93121d01353a64a73ce8c6ef9a8",
+                "sha256:e718f2342e2e099b640a34ab782407b7b676f47ee272d6739e60b8ea23829f2c"
             ],
-            "version": "==4.9.0"
+            "version": "==4.9.1"
         },
         "certifi": {
             "hashes": [
@@ -92,6 +92,20 @@
             ],
             "version": "==2.9"
         },
+        "pypdf2": {
+            "hashes": [
+                "sha256:e28f902f2f0a1603ea95ebe21dff311ef09be3d0f0ef29a3e44a932729564385"
+            ],
+            "index": "pypi",
+            "version": "==1.26.0"
+        },
+        "pypdf4": {
+            "hashes": [
+                "sha256:7c932441146d205572f96254d53c79ea2c30c9e11df55a5cf87e056c7b3d7f89"
+            ],
+            "index": "pypi",
+            "version": "==1.27.0"
+        },
         "pytz": {
             "hashes": [
                 "sha256:a494d53b6d39c3c6e44c3bec237336e14305e4f29bbf800b599253057fbb79ed",
@@ -108,10 +122,10 @@
         },
         "soupsieve": {
             "hashes": [
-                "sha256:e914534802d7ffd233242b785229d5ba0766a7f487385e3f714446a07bf540ae",
-                "sha256:fcd71e08c0aee99aca1b73f45478549ee7e7fc006d51b37bec9e9def7dc22b69"
+                "sha256:1634eea42ab371d3d346309b93df7870a88610f0725d47528be902a0d95ecc55",
+                "sha256:a59dc181727e95d25f781f0eb4fd1825ff45590ec8ff49eadfd7f1a537cc0232"
             ],
-            "version": "==2.0"
+            "version": "==2.0.1"
         },
         "sqlparse": {
             "hashes": [