diff --git a/Pipfile.lock b/Pipfile.lock
index b284718..c82e0eb 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -14,13 +14,28 @@
         ]
     },
     "default": {
+        "importlib-metadata": {
+            "hashes": [
+                "sha256:652234b6ab8f2506ae58e528b6fbcc668831d3cc758e1bc01ef438d328b68cdb",
+                "sha256:6f264986fb88042bc1f0535fa9a557e6a376cfe5679dc77caac7fe8b5d43d05f"
+            ],
+            "markers": "python_version < '3.8'",
+            "version": "==0.22"
+        },
+        "more-itertools": {
+            "hashes": [
+                "sha256:409cd48d4db7052af495b09dec721011634af3753ae1ef92d2b32f73a745f832",
+                "sha256:92b8c4b06dac4f0611c0729b2f2ede52b2e1bac1ab48f089c7ddc12e26bb60c4"
+            ],
+            "version": "==7.2.0"
+        },
         "pluggy": {
             "hashes": [
-                "sha256:25a1bc1d148c9a640211872b4ff859878d422bccb59c9965e04eed468a0aa180",
-                "sha256:964cedd2b27c492fbf0b7f58b3284a09cf7f99b0f715941fb24a439b3af1bd1a"
+                "sha256:0db4b7601aae1d35b4a033282da476845aa19185c1e6964b25cf324b5e4ec3e6",
+                "sha256:fa5fa1622fa6dd5c030e9cad086fa19ef6a0cf6d7a2d12318e10cb49d6d68f34"
             ],
             "index": "pypi",
-            "version": "==0.11.0"
+            "version": "==0.13.0"
         },
         "pypom": {
             "editable": true,
@@ -52,6 +67,13 @@
             ],
             "version": "==1.25.3"
         },
+        "zipp": {
+            "hashes": [
+                "sha256:3718b1cbcd963c7d4c5511a8240812904164b7f381b647143a89d3b98f9bcd8e",
+                "sha256:f06903e9f1f43b12d371004b4ac7b06ab39a44adc747266928ae6debfa7b3335"
+            ],
+            "version": "==0.6.0"
+        },
         "zope-component": {
             "hashes": [
                 "sha256:984a06ba3def0b02b1117fa4c45b56e772e8c29c0340820fbf367e440a93a3a4"
@@ -218,10 +240,10 @@
         },
         "certifi": {
             "hashes": [
-                "sha256:046832c04d4e752f37383b628bc601a7ea7211496b4638f6514d0e5b9acc4939",
-                "sha256:945e3ba63a0b9f577b1395204e13c3a231f9bc0223888be653286534e5873695"
+                "sha256:e4f3620cfea4f83eedc95b24abd9cd56f3c4b146dd0177e83a21b4eb49e21e50",
+                "sha256:fd7c7c74727ddcf00e9acd26bba8da604ffec95bf1c2144e67aff7a8b50e6cef"
             ],
-            "version": "==2019.6.16"
+            "version": "==2019.9.11"
         },
         "chardet": {
             "hashes": [
@@ -335,11 +357,11 @@
         },
         "importlib-metadata": {
             "hashes": [
-                "sha256:23d3d873e008a513952355379d93cbcab874c58f4f034ff657c7a87422fa64e8",
-                "sha256:80d2de76188eabfbfcf27e6a37342c2827801e59c4cc14b0371c56fed43820e3"
+                "sha256:652234b6ab8f2506ae58e528b6fbcc668831d3cc758e1bc01ef438d328b68cdb",
+                "sha256:6f264986fb88042bc1f0535fa9a557e6a376cfe5679dc77caac7fe8b5d43d05f"
             ],
             "markers": "python_version < '3.8'",
-            "version": "==0.19"
+            "version": "==0.22"
         },
         "incremental": {
             "hashes": [
@@ -426,11 +448,11 @@
         },
         "pluggy": {
             "hashes": [
-                "sha256:25a1bc1d148c9a640211872b4ff859878d422bccb59c9965e04eed468a0aa180",
-                "sha256:964cedd2b27c492fbf0b7f58b3284a09cf7f99b0f715941fb24a439b3af1bd1a"
+                "sha256:0db4b7601aae1d35b4a033282da476845aa19185c1e6964b25cf324b5e4ec3e6",
+                "sha256:fa5fa1622fa6dd5c030e9cad086fa19ef6a0cf6d7a2d12318e10cb49d6d68f34"
             ],
             "index": "pypi",
-            "version": "==0.11.0"
+            "version": "==0.13.0"
         },
         "py": {
             "hashes": [
@@ -469,10 +491,10 @@
         },
         "pytest": {
             "hashes": [
-                "sha256:95b1f6db806e5b1b5b443efeb58984c24945508f93a866c1719e1a507a957d7c",
-                "sha256:c3d5020755f70c82eceda3feaf556af9a341334414a8eca521a18f463bcead88"
+                "sha256:95d13143cc14174ca1a01ec68e84d76ba5d9d493ac02716fd9706c949a505210",
+                "sha256:b78fe2881323bd44fd9bd76e5317173d4316577e7b1cddebae9136a4495ec865"
             ],
-            "version": "==5.1.1"
+            "version": "==5.1.2"
         },
         "pytest-cov": {
             "hashes": [
@@ -505,9 +527,9 @@
         },
         "snowballstemmer": {
             "hashes": [
-                "sha256:9f3b9ffe0809d174f7047e121431acf99c89a7040f0ca84f94ba53a498e6d0c9"
+                "sha256:713e53b79cbcf97bc5245a06080a33d54a77e7cce2f789c835a143bcdb5c033e"
             ],
-            "version": "==1.9.0"
+            "version": "==1.9.1"
         },
         "sphinx": {
             "hashes": [
@@ -605,10 +627,10 @@
         },
         "zipp": {
             "hashes": [
-                "sha256:4970c3758f4e89a7857a973b1e2a5d75bcdc47794442f2e2dd4fe8e0466e809a",
-                "sha256:8a5712cfd3bb4248015eb3b0b3c54a5f6ee3f2425963ef2a0125b8bc40aafaec"
+                "sha256:3718b1cbcd963c7d4c5511a8240812904164b7f381b647143a89d3b98f9bcd8e",
+                "sha256:f06903e9f1f43b12d371004b4ac7b06ab39a44adc747266928ae6debfa7b3335"
             ],
-            "version": "==0.5.2"
+            "version": "==0.6.0"
         }
     }
 }