diff --git a/Pipfile.lock b/Pipfile.lock
index b284718..4a4eec3 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -47,10 +47,10 @@
         },
         "urllib3": {
             "hashes": [
-                "sha256:b246607a25ac80bedac05c6f282e3cdaf3afb65420fd024ac94435cabe6e18d1",
-                "sha256:dbe59173209418ae49d485b87d1681aefa36252ee85884c31346debd19463232"
+                "sha256:3de946ffbed6e6746608990594d08faac602528ac7015ac28d33cee6a45b7398",
+                "sha256:9a107b99a5393caf59c7aa3c1249c16e6879447533d0887f4336dde834c7be86"
             ],
-            "version": "==1.25.3"
+            "version": "==1.25.6"
         },
         "zope-component": {
             "hashes": [
@@ -204,10 +204,10 @@
         },
         "attrs": {
             "hashes": [
-                "sha256:69c0dbf2ed392de1cb5ec704444b08a5ef81680a61cb899dc08127123af36a79",
-                "sha256:f0b870f674851ecbfbbbd364d6b5cbdff9dcedbc7f3f5e18a6891057f21fe399"
+                "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c",
+                "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"
             ],
-            "version": "==19.1.0"
+            "version": "==19.3.0"
         },
         "babel": {
             "hashes": [
@@ -218,10 +218,10 @@
         },
         "certifi": {
             "hashes": [
-                "sha256:046832c04d4e752f37383b628bc601a7ea7211496b4638f6514d0e5b9acc4939",
-                "sha256:945e3ba63a0b9f577b1395204e13c3a231f9bc0223888be653286534e5873695"
+                "sha256:e4f3620cfea4f83eedc95b24abd9cd56f3c4b146dd0177e83a21b4eb49e21e50",
+                "sha256:fd7c7c74727ddcf00e9acd26bba8da604ffec95bf1c2144e67aff7a8b50e6cef"
             ],
-            "version": "==2019.6.16"
+            "version": "==2019.9.11"
         },
         "chardet": {
             "hashes": [
@@ -335,11 +335,11 @@
         },
         "importlib-metadata": {
             "hashes": [
-                "sha256:23d3d873e008a513952355379d93cbcab874c58f4f034ff657c7a87422fa64e8",
-                "sha256:80d2de76188eabfbfcf27e6a37342c2827801e59c4cc14b0371c56fed43820e3"
+                "sha256:aa18d7378b00b40847790e7c27e11673d7fed219354109d0e7b9e5b25dc3ad26",
+                "sha256:d5f18a79777f3aa179c145737780282e27b508fc8fd688cb17c7a813e8bd39af"
             ],
             "markers": "python_version < '3.8'",
-            "version": "==0.19"
+            "version": "==0.23"
         },
         "incremental": {
             "hashes": [
@@ -357,10 +357,10 @@
         },
         "jinja2": {
             "hashes": [
-                "sha256:065c4f02ebe7f7cf559e49ee5a95fb800a9e4528727aec6f24402a5374c65013",
-                "sha256:14dd6caf1527abb21f08f86c784eac40853ba93edb79552aa1e4b8aef1b61c7b"
+                "sha256:74320bb91f31270f9551d46522e33af46a80c3d619f4a4bf42b3164d30b5911f",
+                "sha256:9fe95f19286cfefaa917656583d020be14e7859c6b0252588391e47db34527de"
             ],
-            "version": "==2.10.1"
+            "version": "==2.10.3"
         },
         "markupsafe": {
             "hashes": [
@@ -419,10 +419,10 @@
         },
         "packaging": {
             "hashes": [
-                "sha256:a7ac867b97fdc07ee80a8058fe4435ccd274ecc3b0ed61d852d7d53055528cf9",
-                "sha256:c491ca87294da7cc01902edbe30a5bc6c4c28172b5138ab4e4aa1b9d7bfaeafe"
+                "sha256:28b924174df7a2fa32c1953825ff29c61e2f5e082343165438812f00d3a7fc47",
+                "sha256:d9551545c6d761f3def1677baf08ab2a3ca17c56879e70fecba2fc4dde4ed108"
             ],
-            "version": "==19.1"
+            "version": "==19.2"
         },
         "pluggy": {
             "hashes": [
@@ -469,10 +469,10 @@
         },
         "pytest": {
             "hashes": [
-                "sha256:95b1f6db806e5b1b5b443efeb58984c24945508f93a866c1719e1a507a957d7c",
-                "sha256:c3d5020755f70c82eceda3feaf556af9a341334414a8eca521a18f463bcead88"
+                "sha256:27abc3fef618a01bebb1f0d6d303d2816a99aa87a5968ebc32fe971be91eb1e6",
+                "sha256:58cee9e09242937e136dbb3dab466116ba20d6b7828c7620f23947f37eb4dae4"
             ],
-            "version": "==5.1.1"
+            "version": "==5.2.2"
         },
         "pytest-cov": {
             "hashes": [
@@ -484,10 +484,10 @@
         },
         "pytz": {
             "hashes": [
-                "sha256:26c0b32e437e54a18161324a2fca3c4b9846b74a8dccddd843113109e1116b32",
-                "sha256:c894d57500a4cd2d5c71114aaab77dbab5eabd9022308ce5ac9bb93a60a6f0c7"
+                "sha256:1c557d7d0e871de1f5ccd5833f60fb2550652da6be2693c1e02300743d21500d",
+                "sha256:b02c06db6cf09c12dd25137e563b31700d3b80fcc4ad23abb7a315f2789819be"
             ],
-            "version": "==2019.2"
+            "version": "==2019.3"
         },
         "requests": {
             "hashes": [
@@ -505,17 +505,18 @@
         },
         "snowballstemmer": {
             "hashes": [
-                "sha256:9f3b9ffe0809d174f7047e121431acf99c89a7040f0ca84f94ba53a498e6d0c9"
+                "sha256:209f257d7533fdb3cb73bdbd24f436239ca3b2fa67d56f6ff88e86be08cc5ef0",
+                "sha256:df3bac3df4c2c01363f3dd2cfa78cce2840a79b9f1c2d2de9ce8d31683992f52"
             ],
-            "version": "==1.9.0"
+            "version": "==2.0.0"
         },
         "sphinx": {
             "hashes": [
-                "sha256:423280646fb37944dd3c85c58fb92a20d745793a9f6c511f59da82fa97cd404b",
-                "sha256:de930f42600a4fef993587633984cc5027dedba2464bcf00ddace26b40f8d9ce"
+                "sha256:31088dfb95359384b1005619827eaee3056243798c62724fd3fa4b84ee4d71bd",
+                "sha256:52286a0b9d7caa31efee301ec4300dbdab23c3b05da1c9024b4e84896fb73d79"
             ],
             "index": "pypi",
-            "version": "==2.0.1"
+            "version": "==2.2.1"
         },
         "sphinx-rtd-theme": {
             "hashes": [
@@ -569,10 +570,10 @@
         },
         "testfixtures": {
             "hashes": [
-                "sha256:665a298976c8d77f311b65c46f16b7cda7229a47dff5ad7c822e5b3371a439e2",
-                "sha256:9d230c5c80746f9f86a16a1f751a5cf5d8e317d4cc48243a19fb180d22303bce"
+                "sha256:18f5ea13a40a3b3a9184b785d2abfbaabd2a24dace9158962cd6334bf08b7e70",
+                "sha256:abbca7ed381d34a77699c6cb68be67919a1e7f5cf8728b57396145417fa34110"
             ],
-            "version": "==6.10.0"
+            "version": "==6.10.1"
         },
         "toml": {
             "hashes": [
@@ -591,10 +592,10 @@
         },
         "urllib3": {
             "hashes": [
-                "sha256:b246607a25ac80bedac05c6f282e3cdaf3afb65420fd024ac94435cabe6e18d1",
-                "sha256:dbe59173209418ae49d485b87d1681aefa36252ee85884c31346debd19463232"
+                "sha256:3de946ffbed6e6746608990594d08faac602528ac7015ac28d33cee6a45b7398",
+                "sha256:9a107b99a5393caf59c7aa3c1249c16e6879447533d0887f4336dde834c7be86"
             ],
-            "version": "==1.25.3"
+            "version": "==1.25.6"
         },
         "wcwidth": {
             "hashes": [
@@ -605,10 +606,10 @@
         },
         "zipp": {
             "hashes": [
-                "sha256:4970c3758f4e89a7857a973b1e2a5d75bcdc47794442f2e2dd4fe8e0466e809a",
-                "sha256:8a5712cfd3bb4248015eb3b0b3c54a5f6ee3f2425963ef2a0125b8bc40aafaec"
+                "sha256:3718b1cbcd963c7d4c5511a8240812904164b7f381b647143a89d3b98f9bcd8e",
+                "sha256:f06903e9f1f43b12d371004b4ac7b06ab39a44adc747266928ae6debfa7b3335"
             ],
-            "version": "==0.5.2"
+            "version": "==0.6.0"
         }
     }
 }