diff --git a/package-lock.json b/package-lock.json
index 66a010f..92ced88 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -32,6 +32,23 @@
       "integrity": "sha1-EFSVrlNh1pe9GVyCUZLhrX8lN4c=",
       "dev": true
     },
+    "acorn-globals": {
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+      "resolved": "https://registry.npmjs.org/acorn-globals/-/acorn-globals-4.1.0.tgz",
+      "integrity": "sha512-KjZwU26uG3u6eZcfGbTULzFcsoz6pegNKtHPksZPOUsiKo5bUmiBPa38FuHZ/Eun+XYh/JCCkS9AS3Lu4McQOQ==",
+      "dev": true,
+      "requires": {
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+      "dependencies": {
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+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.2.1.tgz",
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+          "dev": true
+        }
+      }
+    },
     "acorn-jsx": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-3.0.1.tgz",
@@ -291,6 +308,12 @@
         "umd": "3.0.1"
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+    "browser-process-hrtime": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/browser-process-hrtime/-/browser-process-hrtime-0.1.2.tgz",
+      "integrity": "sha1-Ql1opY00R/AqBKqJQYf86K+Le44=",
+      "dev": true
+    },
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       "resolved": "https://registry.npmjs.org/browser-resolve/-/browser-resolve-1.11.2.tgz",
@@ -1924,6 +1947,46 @@
       "dev": true,
       "optional": true
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+    "jsdom": {
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+      "resolved": "https://registry.npmjs.org/jsdom/-/jsdom-11.5.1.tgz",
+      "integrity": "sha512-89ztIZ03aYK9f1uUrLXLsZndRge/JnZjzjpaN+lrse3coqz+8PR/dX4WLHpbF5fIKTXhDjFODOJw2328lPJ90g==",
+      "dev": true,
+      "requires": {
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+        "acorn": "5.2.1",
+        "acorn-globals": "4.1.0",
+        "array-equal": "1.0.0",
+        "browser-process-hrtime": "0.1.2",
+        "content-type-parser": "1.0.2",
+        "cssom": "0.3.2",
+        "cssstyle": "0.2.37",
+        "domexception": "1.0.0",
+        "escodegen": "1.9.0",
+        "html-encoding-sniffer": "1.0.2",
+        "left-pad": "1.2.0",
+        "nwmatcher": "1.4.3",
+        "parse5": "3.0.3",
+        "pn": "1.0.0",
+        "request": "2.83.0",
+        "request-promise-native": "1.0.5",
+        "sax": "1.2.4",
+        "symbol-tree": "3.2.2",
+        "tough-cookie": "2.3.3",
+        "webidl-conversions": "4.0.2",
+        "whatwg-encoding": "1.0.3",
+        "whatwg-url": "6.4.0",
+        "xml-name-validator": "2.0.1"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.2.1.tgz",
+          "integrity": "sha512-jG0u7c4Ly+3QkkW18V+NRDN+4bWHdln30NL1ZL2AvFZZmQe/BfopYCtghCKKVBUSetZ4QKcyA0pY6/4Gw8Pv8w==",
+          "dev": true
+        }
+      }
+    },
     "json-schema": {
       "version": "0.2.3",
       "resolved": "https://registry.npmjs.org/json-schema/-/json-schema-0.2.3.tgz",
@@ -2006,6 +2069,12 @@
         }
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+    "left-pad": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/left-pad/-/left-pad-1.2.0.tgz",
+      "integrity": "sha1-0wpzxrggHY99jnlWupYWCHpo4O4=",
+      "dev": true
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       "resolved": "https://registry.npmjs.org/levn/-/levn-0.3.0.tgz",
@@ -2378,6 +2447,15 @@
         "error-ex": "1.3.1"
       }
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+    "parse5": {
+      "version": "3.0.3",
+      "resolved": "https://registry.npmjs.org/parse5/-/parse5-3.0.3.tgz",
+      "integrity": "sha512-rgO9Zg5LLLkfJF9E6CCmXlSE4UVceloys8JrFqCcHloC3usd/kJCyPDwH2SOlzix2j3xaP9sUX3e8+kvkuleAA==",
+      "dev": true,
+      "requires": {
+        "@types/node": "6.0.90"
+      }
+    },
     "path-browserify": {
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       "resolved": "https://registry.npmjs.org/path-browserify/-/path-browserify-0.0.0.tgz",
@@ -3211,6 +3289,23 @@
         "punycode": "1.4.1"
       }
     },
+    "tr46": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-1.0.1.tgz",
+      "integrity": "sha1-qLE/1r/SSJUZZ0zN5VujaTtwbQk=",
+      "dev": true,
+      "requires": {
+        "punycode": "2.1.0"
+      },
+      "dependencies": {
+        "punycode": {
+          "version": "2.1.0",
+          "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.0.tgz",
+          "integrity": "sha1-X4Y+3Im5bbCQdLrXlHvwkFbKTn0=",
+          "dev": true
+        }
+      }
+    },
     "tryit": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/tryit/-/tryit-1.0.3.tgz",
@@ -3233,87 +3328,13 @@
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-      "resolved": "https://registry.npmjs.org/turndown/-/turndown-0.0.8.tgz",
-      "integrity": "sha1-hTC0aImnDuuO1BG8Yt3QhX8M8gw=",
+      "version": "4.0.0-rc.2",
+      "resolved": "https://registry.npmjs.org/turndown/-/turndown-4.0.0-rc.2.tgz",
+      "integrity": "sha512-M/OQtkaavA3ZkuRhdKz9MWJ26e594vBRuOXpKd7n6OKsvgRkZk/uuKS8fBhaD62BlvZuuGeohVwesum+Mboy9w==",
       "dev": true,
       "requires": {
         "collapse-whitespace": "1.1.6",
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-      "dependencies": {
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-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-4.0.13.tgz",
-          "integrity": "sha1-EFSVrlNh1pe9GVyCUZLhrX8lN4c=",
-          "dev": true
-        },
-        "acorn-globals": {
-          "version": "3.1.0",
-          "resolved": "https://registry.npmjs.org/acorn-globals/-/acorn-globals-3.1.0.tgz",
-          "integrity": "sha1-/YJw9x+7SZawBPqIDuXUZXOnMb8=",
-          "dev": true,
-          "requires": {
-            "acorn": "4.0.13"
-          }
-        },
-        "jsdom": {
-          "version": "9.12.0",
-          "resolved": "https://registry.npmjs.org/jsdom/-/jsdom-9.12.0.tgz",
-          "integrity": "sha1-6MVG//ywbADUgzyoRBD+1/igl9Q=",
-          "dev": true,
-          "requires": {
-            "abab": "1.0.4",
-            "acorn": "4.0.13",
-            "acorn-globals": "3.1.0",
-            "array-equal": "1.0.0",
-            "content-type-parser": "1.0.2",
-            "cssom": "0.3.2",
-            "cssstyle": "0.2.37",
-            "escodegen": "1.9.0",
-            "html-encoding-sniffer": "1.0.2",
-            "nwmatcher": "1.4.3",
-            "parse5": "1.5.1",
-            "request": "2.83.0",
-            "sax": "1.2.4",
-            "symbol-tree": "3.2.2",
-            "tough-cookie": "2.3.3",
-            "webidl-conversions": "4.0.2",
-            "whatwg-encoding": "1.0.3",
-            "whatwg-url": "4.8.0",
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-          "resolved": "https://registry.npmjs.org/parse5/-/parse5-1.5.1.tgz",
-          "integrity": "sha1-m387DeMr543CQBsXVzzK8Pb1nZQ=",
-          "dev": true
-        },
-        "tr46": {
-          "version": "0.0.3",
-          "resolved": "https://registry.npmjs.org/tr46/-/tr46-0.0.3.tgz",
-          "integrity": "sha1-gYT9NH2snNwYWZLzpmIuFLnZq2o=",
-          "dev": true
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-        "whatwg-url": {
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-          "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-4.8.0.tgz",
-          "integrity": "sha1-0pgaqRSMHgCkHFphMRZqtGg7vMA=",
-          "dev": true,
-          "requires": {
-            "tr46": "0.0.3",
-            "webidl-conversions": "3.0.1"
-          },
-          "dependencies": {
-            "webidl-conversions": {
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-              "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-3.0.1.tgz",
-              "integrity": "sha1-JFNCdeKnvGvnvIZhHMFq4KVlSHE=",
-              "dev": true
-            }
-          }
-        }
+        "jsdom": "11.5.1"
       }
     },
     "turndown-attendant": {
@@ -3539,6 +3560,17 @@
         "iconv-lite": "0.4.19"
       }
     },
+    "whatwg-url": {
+      "version": "6.4.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-6.4.0.tgz",
+      "integrity": "sha512-Z0CVh/YE217Foyb488eo+iBv+r7eAQ0wSTyApi9n06jhcA3z6Nidg/EGvl0UFkg7kMdKxfBzzr+o9JF+cevgMg==",
+      "dev": true,
+      "requires": {
+        "lodash.sortby": "4.7.0",
+        "tr46": "1.0.1",
+        "webidl-conversions": "4.0.2"
+      }
+    },
     "wordwrap": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",