diff --git a/Pipfile.lock b/Pipfile.lock
index d833d234..17721b7b 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -54,17 +54,18 @@
         },
         "astroid": {
             "hashes": [
-                "sha256:a48b57ede295c3188ef5c84273bc2a8eadc46e4cbb001eae0d49fb5d1fabbb19",
-                "sha256:d066cdeec5faeb51a4be5010da612680653d844b57afd86a5c8315f2f801b4cc"
+                "sha256:292fa429e69d60e4161e7612cb7cc8fa3609e2e309f80c224d93a76d5e7b58be",
+                "sha256:c7013d119ec95eb626f7a2011f0b63d0c9a095df9ad06d8507b37084eada1a8d"
             ],
-            "version": "==2.0.2"
+            "version": "==2.0.4"
         },
         "atomicwrites": {
             "hashes": [
-                "sha256:240831ea22da9ab882b551b31d4225591e5e447a68c5e188db5b89ca1d487585",
-                "sha256:a24da68318b08ac9c9c45029f4a10371ab5b20e4226738e150e6e7c571630ae6"
+                "sha256:6b5282987b21cd79151f51caccead7a09d0a32e89c568bd9e3c4aaa7bbdf3f3a",
+                "sha256:e16334d50fe0f90919ef7339c24b9b62e6abaa78cd2d226f3d94eb067eb89043"
             ],
-            "version": "==1.1.5"
+            "markers": "python_version >= '2.7' and python_version != '3.1.*' and python_version != '3.2.*' and python_version != '3.0.*' and python_version != '3.3.*'",
+            "version": "==1.2.0"
         },
         "attrs": {
             "hashes": [
@@ -75,10 +76,10 @@
         },
         "certifi": {
             "hashes": [
-                "sha256:13e698f54293db9f89122b0581843a782ad0934a4fe0172d2a980ba77fc61bb7",
-                "sha256:9fa520c1bacfb634fa7af20a76bcbd3d5fb390481724c597da32c719a7dca4b0"
+                "sha256:376690d6f16d32f9d1fe8932551d80b23e9d393a8578c5633a2ed39a64861638",
+                "sha256:456048c7e371c089d0a77a5212fb37a2c2dce1e24146e3b7e0261736aaeaa22a"
             ],
-            "version": "==2018.4.16"
+            "version": "==2018.8.24"
         },
         "chardet": {
             "hashes": [
@@ -149,7 +150,7 @@
                 "sha256:e05cb4d9aad6233d67e0541caa7e511fa4047ed7750ec2510d466e806e0255d6",
                 "sha256:f3f501f345f24383c0000395b26b726e46758b71393267aeae0bd36f8b3ade80"
             ],
-            "markers": "python_version < '4' and python_version != '3.1.*' and python_version >= '2.6' and python_version != '3.0.*' and python_version != '3.2.*'",
+            "markers": "python_version != '3.1.*' and python_version != '3.0.*' and python_version != '3.2.*' and python_version < '4' and python_version >= '2.6'",
             "version": "==4.5.1"
         },
         "dependency-management": {
@@ -172,7 +173,7 @@
                 "sha256:b9c40e9750f3d77e6e4d441d8b0266cf555e7cdabdcff33c4fd06366ca761ef8",
                 "sha256:ec9ef8f4a9bc6f71eec99e1806bfa2de401650d996c59330782b89a5555c1497"
             ],
-            "markers": "python_version >= '2.7' and python_version != '3.1.*' and python_version != '3.2.*' and python_version != '3.0.*' and python_version != '3.3.*'",
+            "markers": "python_version != '3.3.*' and python_version != '3.2.*' and python_version >= '2.7' and python_version != '3.0.*' and python_version != '3.1.*'",
             "version": "==4.3.4"
         },
         "lazy-object-proxy": {
@@ -235,7 +236,7 @@
                 "sha256:6e3836e39f4d36ae72840833db137f7b7d35105079aee6ec4a62d9f80d594dd1",
                 "sha256:95eb8364a4708392bae89035f45341871286a333f749c3141c20573d2b3876e1"
             ],
-            "markers": "python_version != '3.3.*' and python_version != '3.1.*' and python_version >= '2.7' and python_version != '3.0.*' and python_version != '3.2.*'",
+            "markers": "python_version >= '2.7' and python_version != '3.1.*' and python_version != '3.2.*' and python_version != '3.0.*' and python_version != '3.3.*'",
             "version": "==0.7.1"
         },
         "py": {
@@ -243,7 +244,7 @@
                 "sha256:3fd59af7435864e1a243790d322d763925431213b6b8529c6ca71081ace3bbf7",
                 "sha256:e31fb2767eb657cbde86c454f02e99cb846d3cd9d61b318525140214fdc0e98e"
             ],
-            "markers": "python_version != '3.3.*' and python_version != '3.1.*' and python_version >= '2.7' and python_version != '3.0.*' and python_version != '3.2.*'",
+            "markers": "python_version >= '2.7' and python_version != '3.1.*' and python_version != '3.2.*' and python_version != '3.0.*' and python_version != '3.3.*'",
             "version": "==1.5.4"
         },
         "pycodestyle": {
@@ -298,11 +299,11 @@
         },
         "pytest": {
             "hashes": [
-                "sha256:86a8dbf407e437351cef4dba46736e9c5a6e3c3ac71b2e942209748e76ff2086",
-                "sha256:e74466e97ac14582a8188ff4c53e6cc3810315f342f6096899332ae864c1d432"
+                "sha256:2e7c330338b2732ddb992217962e3454aa7290434e75329b1a6739cea41bea6b",
+                "sha256:4abcd98faeea3eb95bd05aa6a7b121d5f89d72e4d36ddb0dcbbfd1ec9f3651d1"
             ],
             "index": "pypi",
-            "version": "==3.7.1"
+            "version": "==3.7.3"
         },
         "pytest-cov": {
             "hashes": [
@@ -341,6 +342,7 @@
                 "sha256:63b52e3c866428a224f97cab011de738c36aec0185aa91cfacd418b5d58911d1",
                 "sha256:ec22d826a36ed72a7358ff3fe56cbd4ba69dd7a6718ffd450ff0e9df7a47ce6a"
             ],
+            "markers": "python_version < '4' and python_version != '3.3.*' and python_version >= '2.6' and python_version != '3.2.*' and python_version != '3.0.*' and python_version != '3.1.*'",
             "version": "==2.19.1"
         },
         "sarge": {
@@ -395,16 +397,9 @@
                 "sha256:edb04bdd45bfd76c8292c4d9654568efaedf76fe78eb246dde69bdb13b2dad87",
                 "sha256:f19f2a4f547505fe9072e15f6f4ae714af51b5a681a97f187971f50c283193b6"
             ],
+            "markers": "python_version < '3.7' and implementation_name == 'cpython'",
             "version": "==1.1.0"
         },
-        "typing": {
-            "hashes": [
-                "sha256:3a887b021a77b292e151afb75323dea88a7bc1b3dfa92176cff8e44c8b68bddf",
-                "sha256:b2c689d54e1144bbcfd191b0832980a21c2dbcf7b5ff7a66248a60c90e951eb8",
-                "sha256:d400a9344254803a2368533e4533a4200d21eb7b6b729c173bc38201a74db3f2"
-            ],
-            "version": "==3.6.4"
-        },
         "unidiff": {
             "hashes": [
                 "sha256:6e7ff4be1a9cd8d72197cd15ec735260b8b95d6f9d3e6fdc8a37301b12af0b27",
@@ -417,7 +412,7 @@
                 "sha256:a68ac5e15e76e7e5dd2b8f94007233e01effe3e50e8daddf69acfd81cb686baf",
                 "sha256:b5725a0bd4ba422ab0e66e89e030c806576753ea3ee08554382c14e685d117b5"
             ],
-            "markers": "python_version >= '2.6' and python_version != '3.2.*' and python_version < '4' and python_version != '3.0.*' and python_version != '3.3.*' and python_version != '3.1.*'",
+            "markers": "python_version < '4' and python_version != '3.3.*' and python_version >= '2.6' and python_version != '3.2.*' and python_version != '3.0.*' and python_version != '3.1.*'",
             "version": "==1.23"
         },
         "wrapt": {