diff --git a/Pipfile.lock b/Pipfile.lock
index 5c995c3..3c071fb 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -40,11 +40,11 @@
         },
         "extruct": {
             "hashes": [
-                "sha256:38debff85f9387ea5c6e63c4c63b8cf2a0b7152878fdf67231cdbee3cb0b9f31",
-                "sha256:4df0ed2c58216f5b4ab1dd8bf727a808f5fa71040c0f58d39f7074230b1e1289"
+                "sha256:0bff6fa9fabf040515abf6fd27880f1e42d649ab8b8e9d8ee65dc8d262597904",
+                "sha256:ed5a1f41f0e023ba1086f98a6d0c282e8c62af01c6224449736e303c02b07497"
             ],
             "index": "pypi",
-            "version": "==0.9.0"
+            "version": "==0.10.0"
         },
         "html-text": {
             "hashes": [
@@ -58,7 +58,6 @@
                 "sha256:0d78f8fde1c230e99fe37986a60526d7049ed4bf8a9fadbad5f00e22e58e041d",
                 "sha256:b2e5b40261e20f354d198eae92afc10d750afb487ed5e50f9c4eaf07c184146f"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
             "version": "==1.1"
         },
         "idna": {
@@ -66,7 +65,6 @@
                 "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6",
                 "sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.10"
         },
         "isodate": {
@@ -76,6 +74,12 @@
             ],
             "version": "==0.6.0"
         },
+        "jstyleson": {
+            "hashes": [
+                "sha256:680003f3b15a2959e4e6a351f3b858e3c07dd3e073a0d54954e34d8ea5e1308e"
+            ],
+            "version": "==0.0.2"
+        },
         "lxml": {
             "hashes": [
                 "sha256:05a444b207901a68a6526948c7cc8f9fe6d6f24c70781488e32fd74ff5996e3f",
@@ -110,7 +114,6 @@
                 "sha256:ecc930ae559ea8a43377e8b60ca6f8d61ac532fc57efb915d899de4a67928efd",
                 "sha256:f161af26f596131b63b236372e4ce40f3167c1b5b5d459b29d2514bd8c9dc9ee"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'",
             "version": "==4.5.2"
         },
         "mf2py": {
@@ -124,7 +127,6 @@
                 "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1",
                 "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"
             ],
-            "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.4.7"
         },
         "rdflib": {
@@ -153,7 +155,6 @@
                 "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259",
                 "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==1.15.0"
         },
         "soupsieve": {
@@ -161,7 +162,6 @@
                 "sha256:1634eea42ab371d3d346309b93df7870a88610f0725d47528be902a0d95ecc55",
                 "sha256:a59dc181727e95d25f781f0eb4fd1825ff45590ec8ff49eadfd7f1a537cc0232"
             ],
-            "markers": "python_version >= '3.5'",
             "version": "==2.0.1"
         },
         "urllib3": {
@@ -169,7 +169,6 @@
                 "sha256:91056c15fa70756691db97756772bb1eb9678fa585d9184f24534b100dc60f4a",
                 "sha256:e7983572181f5e1522d9c98453462384ee92a0be7fac5f1413a1e35c56cc0461"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4' and python_version < '4'",
             "version": "==1.25.10"
         },
         "w3lib": {
@@ -190,11 +189,10 @@
     "develop": {
         "attrs": {
             "hashes": [
-                "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c",
-                "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"
+                "sha256:0ef97238856430dcf9228e07f316aefc17e8939fc8507e18c6501b761ef1a42a",
+                "sha256:2867b7b9f8326499ab5b0e2d12801fa5c98842d2cbd22b35112ae04bf85b4dff"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
-            "version": "==19.3.0"
+            "version": "==20.1.0"
         },
         "iniconfig": {
             "hashes": [
@@ -205,18 +203,16 @@
         },
         "more-itertools": {
             "hashes": [
-                "sha256:68c70cc7167bdf5c7c9d8f6954a7837089c6a36bf565383919bb595efb8a17e5",
-                "sha256:b78134b2063dd214000685165d81c154522c3ee0a1c0d4d113c80361c234c5a2"
+                "sha256:6f83822ae94818eae2612063a5101a7311e68ae8002005b5e05f03fd74a86a20",
+                "sha256:9b30f12df9393f0d28af9210ff8efe48d10c94f73e5daf886f10c4b0b0b4f03c"
             ],
-            "markers": "python_version >= '3.5'",
-            "version": "==8.4.0"
+            "version": "==8.5.0"
         },
         "packaging": {
             "hashes": [
                 "sha256:4357f74f47b9c12db93624a82154e9b120fa8293699949152b22065d556079f8",
                 "sha256:998416ba6962ae7fbd6596850b80e17859a5753ba17c32284f67bfff33784181"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==20.4"
         },
         "pluggy": {
@@ -224,7 +220,6 @@
                 "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0",
                 "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==0.13.1"
         },
         "py": {
@@ -232,7 +227,6 @@
                 "sha256:366389d1db726cd2fcfc79732e75410e5fe4d31db13692115529d34069a043c2",
                 "sha256:9ca6883ce56b4e8da7e79ac18787889fa5206c79dcc67fb065376cd2fe03f342"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==1.9.0"
         },
         "pyparsing": {
@@ -240,7 +234,6 @@
                 "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1",
                 "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"
             ],
-            "markers": "python_version >= '2.6' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==2.4.7"
         },
         "pytest": {
@@ -256,7 +249,6 @@
                 "sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259",
                 "sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced"
             ],
-            "markers": "python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'",
             "version": "==1.15.0"
         },
         "toml": {