diff --git a/Pipfile.lock b/Pipfile.lock
index 874bea9..3ac3e1c 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,20 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "67f9c7f258c9e5a46dc72eadd3650f7269e04699c8bc2bd13e151a5eb5727444"
-        },
-        "host-environment-markers": {
-            "implementation_name": "cpython",
-            "implementation_version": "3.6.3",
-            "os_name": "posix",
-            "platform_machine": "x86_64",
-            "platform_python_implementation": "CPython",
-            "platform_release": "17.3.0",
-            "platform_system": "Darwin",
-            "platform_version": "Darwin Kernel Version 17.3.0: Thu Nov  9 18:09:22 PST 2017; root:xnu-4570.31.3~1/RELEASE_X86_64",
-            "python_full_version": "3.6.3",
-            "python_version": "3.6",
-            "sys_platform": "darwin"
+            "sha256": "30a681e7807ba01693e2b0e0495936f8cf3f8a0942eb3a63417817d1664d1af5"
         },
         "pipfile-spec": 6,
         "requires": {},
@@ -27,130 +14,61 @@
         ]
     },
     "default": {
-        "assertpy": {
-            "hashes": [
-                "sha256:563502ad2d89f5242543924d1ae62472c24daeeaf2ecfd78b004feb0559395b9"
-            ],
-            "version": "==0.12"
-        },
-        "attrs": {
-            "hashes": [
-                "sha256:e7d51b70f19a4da5fe6b3c9938983e0af3b91e230edc504bd73c443d98037063",
-                "sha256:c78f53e32d7cf36d8597c8a2c7e3c0ad210f97b9509e152e4c37fa80869f823c"
-            ],
-            "version": "==17.3.0"
-        },
-        "certifi": {
-            "hashes": [
-                "sha256:244be0d93b71e93fc0a0a479862051414d0e00e16435707e5bf5000f92e04694",
-                "sha256:5ec74291ca1136b40f0379e1128ff80e866597e4e2c1e755739a913bbc3613c0"
-            ],
-            "version": "==2017.11.5"
-        },
-        "chardet": {
-            "hashes": [
-                "sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691",
-                "sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae"
-            ],
-            "version": "==3.0.4"
-        },
         "coloredlogs": {
             "hashes": [
-                "sha256:f08ee2a2cef08163ddd24596e48cba2243937abf915d7fb37d62254596b816a9",
-                "sha256:2725d12281946c459154e9bb28cd1efca257c22d2b3dfe69ae4bf9b5ef5cf57c"
+                "sha256:2725d12281946c459154e9bb28cd1efca257c22d2b3dfe69ae4bf9b5ef5cf57c",
+                "sha256:f08ee2a2cef08163ddd24596e48cba2243937abf915d7fb37d62254596b816a9"
             ],
+            "index": "pypi",
             "version": "==7.3.1"
         },
         "getport": {
             "hashes": [
                 "sha256:58fc3e23e5051614489a89ee75b05abc08694e4ef923f8b4ae48648d7813fd77"
             ],
+            "index": "pypi",
             "version": "==0.1.2"
         },
         "humanfriendly": {
             "hashes": [
-                "sha256:43a43575cc5c1506a50fb5a536757aa0c2ae94c0ec10572b368510c878fdc0b9",
-                "sha256:f1ebb406d37478228b92543c12c27c9a827782d8d241260b3a06512c7f7c3a5e"
-            ],
-            "version": "==4.4.1"
-        },
-        "idna": {
-            "hashes": [
-                "sha256:8c7309c718f94b3a625cb648ace320157ad16ff131ae0af362c9f21b80ef6ec4",
-                "sha256:2c6a5de3089009e3da7c5dde64a141dbc8551d5b7f6cf4ed7c2568d0cc520a8f"
-            ],
-            "version": "==2.6"
-        },
-        "pluggy": {
-            "hashes": [
-                "sha256:7f8ae7f5bdf75671a718d2daf0a64b7885f74510bcd98b1a0bb420eb9a9d0cff"
-            ],
-            "version": "==0.6.0"
-        },
-        "py": {
-            "hashes": [
-                "sha256:8cca5c229d225f8c1e3085be4fcf306090b00850fefad892f9d96c7b6e2f310f",
-                "sha256:ca18943e28235417756316bfada6cd96b23ce60dd532642690dcfdaba988a76d"
-            ],
-            "version": "==1.5.2"
-        },
-        "pytest": {
-            "hashes": [
-                "sha256:ae4a2d0bae1098bbe938ecd6c20a526d5d47a94dc42ad7331c9ad06d0efe4962",
-                "sha256:cf8436dc59d8695346fcd3ab296de46425ecab00d64096cebe79fb51ecb2eb93"
-            ],
-            "version": "==3.3.1"
-        },
-        "pytest-timeout": {
-            "hashes": [
-                "sha256:142739bc1f0687fccb0f013d36c5bbebd0b14b546404e79f4158010e81e5013b",
-                "sha256:68b7d264633d5d33ee6b14ce3a7f7d05f8fd9d2f6ae594283221ec021736b7cd"
+                "sha256:1697e1a8a8f550fd43c2865cd84542fc175a61dcb779b6fee18cf6b6ccba1477",
+                "sha256:6b0b831ce8f15f7300721aa49829fc4e83921a9a301cc7f606be6686a2288ddc"
             ],
-            "version": "==1.2.1"
-        },
-        "requests": {
-            "hashes": [
-                "sha256:6a1b267aa90cac58ac3a765d067950e7dbbf75b1da07e895d1f594193a40a38b",
-                "sha256:9c443e7324ba5b85070c4a818ade28bfabedf16ea10206da1132edaa6dda237e"
-            ],
-            "version": "==2.18.4"
-        },
-        "six": {
-            "hashes": [
-                "sha256:832dc0e10feb1aa2c68dcc57dbb658f1c7e65b9b61af69048abc87a2db00a0eb",
-                "sha256:70e8a77beed4562e7f14fe23a786b54f6296e34344c23bc42f07b15018ff98e9"
-            ],
-            "version": "==1.11.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
+            "version": "==10.0"
         },
         "urllib3": {
             "hashes": [
-                "sha256:06330f386d6e4b195fbfc736b297f58c5a892e4440e54d294d7004e3a9bbea1b",
-                "sha256:cc44da8e1145637334317feebd728bd869a35285b93cbb4cca2577da7e62db4f"
+                "sha256:753a0374df26658f99d826cfe40394a686d05985786d946fbe4165b5148f5a7c",
+                "sha256:a7acd0977125325f516bda9735fa7142b909a8d01e8b2e4c8108d0984e6e0098"
             ],
-            "version": "==1.22"
+            "index": "pypi",
+            "version": "==1.26.5"
         }
     },
     "develop": {
-        "argh": {
+        "assertpy": {
             "hashes": [
-                "sha256:a9b3aaa1904eeb78e32394cd46c6f37ac0fb4af6dc488daa58971bdc7d7fcaf3",
-                "sha256:e9535b8c84dc9571a48999094fda7f33e63c3f1b74f3e5f3ac0105a58405bb65"
+                "sha256:acc64329934ad71a3221de185517a43af33e373bb44dc05b5a9b174394ef4833"
             ],
-            "version": "==0.26.2"
+            "index": "pypi",
+            "version": "==1.1"
         },
         "attrs": {
             "hashes": [
-                "sha256:e7d51b70f19a4da5fe6b3c9938983e0af3b91e230edc504bd73c443d98037063",
-                "sha256:c78f53e32d7cf36d8597c8a2c7e3c0ad210f97b9509e152e4c37fa80869f823c"
+                "sha256:2d27e3784d7a565d36ab851fe94887c5eccd6a463168875832a1be79c82828b4",
+                "sha256:626ba8234211db98e869df76230a137c4c40a12d72445c45d5f5b716f076e2fd"
             ],
-            "version": "==17.3.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
+            "version": "==21.4.0"
         },
         "colorama": {
             "hashes": [
-                "sha256:463f8483208e921368c9f306094eb6f725c6ca42b0f97e313cb5d5512459feda",
-                "sha256:48eb22f4f8461b1df5734a074b57042430fb06e1d61bd1e11b078c0fe6d7a1f1"
+                "sha256:854bf444933e37f5824ae7bfc1e98d5bce2ebe4160d46b5edf346a89358e99da",
+                "sha256:e6c6b4334fc50988a639d9b98aa429a0b57da6e17b9a44f0451f930b6967b7a4"
             ],
-            "version": "==0.3.9"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
+            "version": "==0.4.5"
         },
         "docopt": {
             "hashes": [
@@ -158,69 +76,92 @@
             ],
             "version": "==0.6.2"
         },
-        "pathtools": {
-            "hashes": [
-                "sha256:7c35c5421a39bb82e58018febd90e3b6e5db34c5443aaaf742b3f33d4655f1c0"
-            ],
-            "version": "==0.1.2"
-        },
         "pluggy": {
             "hashes": [
-                "sha256:7f8ae7f5bdf75671a718d2daf0a64b7885f74510bcd98b1a0bb420eb9a9d0cff"
+                "sha256:7f8ae7f5bdf75671a718d2daf0a64b7885f74510bcd98b1a0bb420eb9a9d0cff",
+                "sha256:d345c8fe681115900d6da8d048ba67c25df42973bda370783cd58826442dcd7c",
+                "sha256:e160a7fcf25762bb60efc7e171d4497ff1d8d2d75a3d0df7a21b76821ecbf5c5"
             ],
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==0.6.0"
         },
         "py": {
             "hashes": [
-                "sha256:8cca5c229d225f8c1e3085be4fcf306090b00850fefad892f9d96c7b6e2f310f",
-                "sha256:ca18943e28235417756316bfada6cd96b23ce60dd532642690dcfdaba988a76d"
+                "sha256:51c75c4126074b472f746a24399ad32f6053d1b34b68d2fa41e558e6f4a98719",
+                "sha256:607c53218732647dff4acdfcd50cb62615cedf612e72d1724fb1a0cc6405b378"
             ],
-            "version": "==1.5.2"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
+            "version": "==1.11.0"
         },
         "pytest": {
             "hashes": [
                 "sha256:ae4a2d0bae1098bbe938ecd6c20a526d5d47a94dc42ad7331c9ad06d0efe4962",
                 "sha256:cf8436dc59d8695346fcd3ab296de46425ecab00d64096cebe79fb51ecb2eb93"
             ],
+            "index": "pypi",
             "version": "==3.3.1"
         },
+        "pytest-timeout": {
+            "hashes": [
+                "sha256:142739bc1f0687fccb0f013d36c5bbebd0b14b546404e79f4158010e81e5013b",
+                "sha256:68b7d264633d5d33ee6b14ce3a7f7d05f8fd9d2f6ae594283221ec021736b7cd"
+            ],
+            "index": "pypi",
+            "version": "==1.2.1"
+        },
         "pytest-watch": {
             "hashes": [
                 "sha256:29941f6ff74e6d85cc0796434a5cbc27ebe51e91ed24fd0757fad5cc6fd3d491"
             ],
+            "index": "pypi",
             "version": "==4.1.0"
         },
-        "pyyaml": {
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-            "version": "==3.12"
+        "setuptools": {
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+                "sha256:c1848f654aea2e3526d17fc3ce6aeaa5e7e24e66e645b5be2171f3f6b4e5a178"
+            ],
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         "six": {
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-                "sha256:70e8a77beed4562e7f14fe23a786b54f6296e34344c23bc42f07b15018ff98e9"
+                "sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926",
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-            "version": "==1.11.0"
+            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
+            "version": "==1.16.0"
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         "watchdog": {
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-            ],
-            "version": "==0.8.3"
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+                "sha256:43ce20ebb36a51f21fa376f76d1d4692452b2527ccd601950d69ed36b9e21609",
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+                "sha256:70af927aa1613ded6a68089a9262a009fbdf819f46d09c1a908d4b36e1ba2b2d",
+                "sha256:7a833211f49143c3d336729b0020ffd1274078e94b0ae42e22f596999f50279c",
+                "sha256:8250546a98388cbc00c3ee3cc5cf96799b5a595270dfcfa855491a64b86ef8c3",
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+                "sha256:9f05a5f7c12452f6a27203f76779ae3f46fa30f1dd833037ea8cbc2887c60213",
+                "sha256:a735a990a1095f75ca4f36ea2ef2752c99e6ee997c46b0de507ba40a09bf7330",
+                "sha256:ad576a565260d8f99d97f2e64b0f97a48228317095908568a9d5c786c829d428",
+                "sha256:b530ae007a5f5d50b7fbba96634c7ee21abec70dc3e7f0233339c81943848dc1",
+                "sha256:bfc4d351e6348d6ec51df007432e6fe80adb53fd41183716017026af03427846",
+                "sha256:d3dda00aca282b26194bdd0adec21e4c21e916956d972369359ba63ade616153",
+                "sha256:d9820fe47c20c13e3c9dd544d3706a2a26c02b2b43c993b62fcd8011bcc0adb3",
+                "sha256:ed80a1628cee19f5cfc6bb74e173f1b4189eb532e705e2a13e3250312a62e0c9",
+                "sha256:ee3e38a6cc050a8830089f79cbec8a3878ec2fe5160cdb2dc8ccb6def8552658"
+            ],
+            "markers": "python_version >= '3.6'",
+            "version": "==2.1.9"
         }
     }
 }