diff --git a/Pipfile b/Pipfile
index aa86cce..8bda636 100644
--- a/Pipfile
+++ b/Pipfile
@@ -21,7 +21,7 @@ iniconfig = "==1.1.1"
 mccabe = "==0.6.1"
 more-itertools = "==8.5.0"
 pluggy = "==0.13.1"
-py = "==1.9.0"
+py = "==1.10.0"
 pycodestyle = "==2.6.0"
 pyflakes = "==2.2.0"
 pyparsing = "==2.4.7"
diff --git a/Pipfile.lock b/Pipfile.lock
index 32b23c5..b546212 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "c74c911c73a72cfea7c11d392c926eaaa727120cd272be69972ce9d806e8a5d2"
+            "sha256": "fc582acabe45276e7b42c45bdb8b491a51dde20d9eea809f9905ade8116f9bba"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -138,11 +138,10 @@
         },
         "packaging": {
             "hashes": [
-                "sha256:4357f74f47b9c12db93624a82154e9b120fa8293699949152b22065d556079f8",
-                "sha256:998416ba6962ae7fbd6596850b80e17859a5753ba17c32284f67bfff33784181"
+                "sha256:5b327ac1320dc863dca72f4514ecc086f31186744b84a230374cc1fd776feae5",
+                "sha256:67714da7f7bc052e064859c05c595155bd1ee9f69f76557e21f051443c20947a"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==20.4"
+            "version": "==20.9"
         },
         "pluggy": {
             "hashes": [
@@ -154,11 +153,11 @@
         },
         "py": {
             "hashes": [
-                "sha256:366389d1db726cd2fcfc79732e75410e5fe4d31db13692115529d34069a043c2",
-                "sha256:9ca6883ce56b4e8da7e79ac18787889fa5206c79dcc67fb065376cd2fe03f342"
+                "sha256:21b81bda15b66ef5e1a777a21c4dcd9c20ad3efd0b3f817e7a809035269e1bd3",
+                "sha256:3b80836aa6d1feeaa108e046da6423ab8f6ceda6468545ae8d02d9d58d18818a"
             ],
             "index": "pypi",
-            "version": "==1.9.0"
+            "version": "==1.10.0"
         },
         "pycodestyle": {
             "hashes": [
@@ -340,11 +339,10 @@
         },
         "packaging": {
             "hashes": [
-                "sha256:4357f74f47b9c12db93624a82154e9b120fa8293699949152b22065d556079f8",
-                "sha256:998416ba6962ae7fbd6596850b80e17859a5753ba17c32284f67bfff33784181"
+                "sha256:5b327ac1320dc863dca72f4514ecc086f31186744b84a230374cc1fd776feae5",
+                "sha256:67714da7f7bc052e064859c05c595155bd1ee9f69f76557e21f051443c20947a"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==20.4"
+            "version": "==20.9"
         },
         "pluggy": {
             "hashes": [
@@ -356,11 +354,11 @@
         },
         "py": {
             "hashes": [
-                "sha256:366389d1db726cd2fcfc79732e75410e5fe4d31db13692115529d34069a043c2",
-                "sha256:9ca6883ce56b4e8da7e79ac18787889fa5206c79dcc67fb065376cd2fe03f342"
+                "sha256:21b81bda15b66ef5e1a777a21c4dcd9c20ad3efd0b3f817e7a809035269e1bd3",
+                "sha256:3b80836aa6d1feeaa108e046da6423ab8f6ceda6468545ae8d02d9d58d18818a"
             ],
             "index": "pypi",
-            "version": "==1.9.0"
+            "version": "==1.10.0"
         },
         "pycodestyle": {
             "hashes": [
@@ -410,14 +408,6 @@
             "index": "pypi",
             "version": "==3.3.1"
         },
-        "six": {
-            "hashes": [
-                "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259",
-                "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"
-            ],
-            "index": "pypi",
-            "version": "==1.15.0"
-        },
         "toml": {
             "hashes": [
                 "sha256:926b612be1e5ce0634a2ca03470f95169cf16f939018233a670519cb4ac58b0f",
@@ -426,6 +416,15 @@
             "index": "pypi",
             "version": "==0.10.1"
         },
+        "typing-extensions": {
+            "hashes": [
+                "sha256:7cb407020f00f7bfc3cb3e7881628838e69d8f3fcab2f64742a5e76b2f841918",
+                "sha256:99d4073b617d30288f569d3f13d2bd7548c3a7e4c8de87db09a9d29bb3a4a60c",
+                "sha256:dafc7639cde7f1b6e1acc0f457842a83e722ccca8eef5270af2d74792619a89f"
+            ],
+            "markers": "python_version < '3.8'",
+            "version": "==3.7.4.3"
+        },
         "zipp": {
             "hashes": [
                 "sha256:16522f69653f0d67be90e8baa4a46d66389145b734345d68a257da53df670903",