Bump beautifulsoup4 from 4.9.0 to 4.9.1

Bumps [beautifulsoup4](http://www.crummy.com/software/BeautifulSoup/bs4/) from 4.9.0 to 4.9.1.

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Pipfile

@@ -7,7 +7,7 @@ name = "pypi"
 aiodns = "==2.0.0"
 aiohttp = "==3.6.2"
 aiosqlite = "==0.13.0"
-beautifulsoup4 = "==4.9.0"
+beautifulsoup4 = "==4.9.1"
 dnspython = "==1.16.0"
 netaddr = "==0.7.19"
 plotly = "==4.7.1"

Pipfile.lock

@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "f4097511706eba2c516cf941dfcae2a08d10ea30d227b96bb359b3a57fe28373"
+            "sha256": "4e3e0a2cf9165de2411f72187b936c85e11bf2e730636665fa6486571c528ab5"
         },
         "pipfile-spec": 6,
         "requires": {},
@@ -64,12 +64,12 @@
         },
         "beautifulsoup4": {
             "hashes": [
-                "sha256:594ca51a10d2b3443cbac41214e12dbb2a1cd57e1a7344659849e2e20ba6a8d8",
-                "sha256:a4bbe77fd30670455c5296242967a123ec28c37e9702a8a81bd2f20a4baf0368",
-                "sha256:d4e96ac9b0c3a6d3f0caae2e4124e6055c5dcafde8e2f831ff194c104f0775a0"
+                "sha256:73cc4d115b96f79c7d77c1c7f7a0a8d4c57860d1041df407dd1aae7f07a77fd7",
+                "sha256:a6237df3c32ccfaee4fd201c8f5f9d9df619b93121d01353a64a73ce8c6ef9a8",
+                "sha256:e718f2342e2e099b640a34ab782407b7b676f47ee272d6739e60b8ea23829f2c"
             ],
             "index": "pypi",
-            "version": "==4.9.0"
+            "version": "==4.9.1"
         },
         "certifi": {
             "hashes": [
@@ -318,7 +318,6 @@
                 "sha256:1634eea42ab371d3d346309b93df7870a88610f0725d47528be902a0d95ecc55",
                 "sha256:a59dc181727e95d25f781f0eb4fd1825ff45590ec8ff49eadfd7f1a537cc0232"
             ],
-            "index": "pypi",
             "version": "==2.0.1"
         },
         "texttable": {