diff --git a/package-lock.json b/package-lock.json
index c993182..ff1b7d8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -30,6 +30,7 @@
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/adler-32/-/adler-32-1.2.0.tgz",
       "integrity": "sha1-aj5r8KY5ALoVZSgIyxXGgT0aXyU=",
+      "optional": true,
       "requires": {
         "exit-on-epipe": "~1.0.1",
         "printj": "~1.1.0"
@@ -1124,20 +1125,13 @@
         "os-homedir": "^1.0.1",
         "parse-json": "^2.2.0",
         "require-from-string": "^1.1.0"
-      },
-      "dependencies": {
-        "minimist": {
-          "version": "1.2.5",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
-          "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==",
-          "dev": true
-        }
       }
     },
     "crc-32": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/crc-32/-/crc-32-1.2.0.tgz",
       "integrity": "sha512-1uBwHxF+Y/4yF5G48fwnKq6QsIXheor3ZLPT80yGBV1oEUwpPojlEhQbWKVw1VwcTQyMGHK1/XMmTjmlsmTTGA==",
+      "optional": true,
       "requires": {
         "exit-on-epipe": "~1.0.1",
         "printj": "~1.1.0"
@@ -1457,7 +1451,8 @@
     "exit-on-epipe": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/exit-on-epipe/-/exit-on-epipe-1.0.1.tgz",
-      "integrity": "sha512-h2z5mrROTxce56S+pnvAV890uu7ls7f1kEvVGJbw1OlFH3/mlJ5bkXu0KRyW94v37zzHPiUd55iLn3DA7TjWpw=="
+      "integrity": "sha512-h2z5mrROTxce56S+pnvAV890uu7ls7f1kEvVGJbw1OlFH3/mlJ5bkXu0KRyW94v37zzHPiUd55iLn3DA7TjWpw==",
+      "optional": true
     },
     "expand-brackets": {
       "version": "0.1.5",
@@ -1954,14 +1949,6 @@
         "minimist": "^1.1.0",
         "stream-combiner": "^0.2.1",
         "through2": "^0.6.3"
-      },
-      "dependencies": {
-        "minimist": {
-          "version": "1.2.5",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
-          "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==",
-          "dev": true
-        }
       }
     },
     "jsonparse": {
@@ -2103,14 +2090,6 @@
         "read-pkg-up": "^1.0.1",
         "redent": "^1.0.0",
         "trim-newlines": "^1.0.0"
-      },
-      "dependencies": {
-        "minimist": {
-          "version": "1.2.5",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
-          "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==",
-          "dev": true
-        }
       }
     },
     "micromatch": {
@@ -2144,9 +2123,9 @@
       }
     },
     "minimist": {
-      "version": "1.2.5",
-      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
-      "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==",
+      "version": "1.2.6",
+      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.6.tgz",
+      "integrity": "sha512-Jsjnk4bw3YJqYzbdyBiNsPWHPfO++UGG749Cxs6peCu5Xg4nrena6OVxOYxrQTqww0Jmwt+Ref8rggumkTLz9Q==",
       "dev": true
     },
     "mkdirp": {
@@ -2591,7 +2570,8 @@
     "printj": {
       "version": "1.1.2",
       "resolved": "http://registry.npmjs.org/printj/-/printj-1.1.2.tgz",
-      "integrity": "sha512-zA2SmoLaxZyArQTOPj5LXecR+RagfPSU5Kw1qP+jkWeNlrq+eJZyY2oS68SU1Z/7/myXM4lo9716laOFAVStCQ=="
+      "integrity": "sha512-zA2SmoLaxZyArQTOPj5LXecR+RagfPSU5Kw1qP+jkWeNlrq+eJZyY2oS68SU1Z/7/myXM4lo9716laOFAVStCQ==",
+      "optional": true
     },
     "private": {
       "version": "0.1.8",
@@ -3121,12 +3101,6 @@
           "integrity": "sha1-nZ55MWXOAXoA8AQYxD+UKnsdEfo=",
           "dev": true
         },
-        "minimist": {
-          "version": "1.2.5",
-          "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
-          "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==",
-          "dev": true
-        },
         "postcss": {
           "version": "5.2.18",
           "resolved": "https://registry.npmjs.org/postcss/-/postcss-5.2.18.tgz",
@@ -3569,7 +3543,8 @@
     "voc": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/voc/-/voc-1.1.0.tgz",
-      "integrity": "sha512-fthgd8OJLqq8vPcLjElTk6Rcl2e3v5ekcXauImaqEnQqd5yUWKg1+ZOBgS2KTWuVKcuvZMQq4TDptiT1uYddUA=="
+      "integrity": "sha512-fthgd8OJLqq8vPcLjElTk6Rcl2e3v5ekcXauImaqEnQqd5yUWKg1+ZOBgS2KTWuVKcuvZMQq4TDptiT1uYddUA==",
+      "optional": true
     },
     "webcharts": {
       "version": "1.11.1",