diff --git a/package-lock.json b/package-lock.json
index 7793b8a..d8c1af1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1272,26 +1272,11 @@
       "resolved": "https://registry.npmjs.org/array-differ/-/array-differ-1.0.0.tgz",
       "integrity": "sha1-7/UuN1gknTO+QCuLuOVkuytdQDE="
     },
-    "array-filter": {
-      "version": "0.0.1",
-      "resolved": "https://registry.npmjs.org/array-filter/-/array-filter-0.0.1.tgz",
-      "integrity": "sha1-fajPLiZijtcygDWB/SH2fKzS7uw="
-    },
     "array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
     },
-    "array-map": {
-      "version": "0.0.0",
-      "resolved": "https://registry.npmjs.org/array-map/-/array-map-0.0.0.tgz",
-      "integrity": "sha1-iKK6tz0c97zVwbEYoAP2b2ZfpmI="
-    },
-    "array-reduce": {
-      "version": "0.0.0",
-      "resolved": "https://registry.npmjs.org/array-reduce/-/array-reduce-0.0.0.tgz",
-      "integrity": "sha1-FziZ0//Rx9k4PkR5Ul2+J4yrXys="
-    },
     "array-union": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/array-union/-/array-union-1.0.2.tgz",
@@ -2478,11 +2463,6 @@
         "vary": "~1.1.2"
       }
     },
-    "extend": {
-      "version": "3.0.2",
-      "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
-      "integrity": "sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g=="
-    },
     "extend-shallow": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/extend-shallow/-/extend-shallow-3.0.2.tgz",
@@ -2761,7 +2741,8 @@
         },
         "ansi-regex": {
           "version": "2.1.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -2779,11 +2760,13 @@
         },
         "balanced-match": {
           "version": "1.0.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -2796,15 +2779,18 @@
         },
         "code-point-at": {
           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -2907,7 +2893,8 @@
         },
         "inherits": {
           "version": "2.0.3",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -2917,6 +2904,7 @@
         "is-fullwidth-code-point": {
           "version": "1.0.0",
           "bundled": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -2929,17 +2917,20 @@
         "minimatch": {
           "version": "3.0.4",
           "bundled": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
         },
         "minimist": {
           "version": "0.0.8",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.3.5",
           "bundled": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.2",
             "yallist": "^3.0.0"
@@ -2956,6 +2947,7 @@
         "mkdirp": {
           "version": "0.5.1",
           "bundled": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -3028,7 +3020,8 @@
         },
         "number-is-nan": {
           "version": "1.0.1",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -3038,6 +3031,7 @@
         "once": {
           "version": "1.4.0",
           "bundled": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -3113,7 +3107,8 @@
         },
         "safe-buffer": {
           "version": "5.1.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -3143,6 +3138,7 @@
         "string-width": {
           "version": "1.0.2",
           "bundled": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -3160,6 +3156,7 @@
         "strip-ansi": {
           "version": "3.0.1",
           "bundled": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -3198,11 +3195,13 @@
         },
         "wrappy": {
           "version": "1.0.2",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.3",
-          "bundled": true
+          "bundled": true,
+          "optional": true
         }
       }
     },
@@ -3722,11 +3721,6 @@
         "minimist": "^1.2.0"
       }
     },
-    "jsonify": {
-      "version": "0.0.0",
-      "resolved": "https://registry.npmjs.org/jsonify/-/jsonify-0.0.0.tgz",
-      "integrity": "sha1-LHS27kHZPKUbe1qu6PUDYx0lKnM="
-    },
     "junk": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/junk/-/junk-1.0.3.tgz",
@@ -4678,16 +4672,6 @@
         }
       }
     },
-    "postcss-css-variables": {
-      "version": "0.12.0",
-      "resolved": "https://registry.npmjs.org/postcss-css-variables/-/postcss-css-variables-0.12.0.tgz",
-      "integrity": "sha512-fSgIfR+g/kZ2GeV3GH7wyNslDi7KH/Z+zwtHdEcmHv86mu+o71va9r9rqFLPR0VKi2BzoQZbCyw89oXK/XevIQ==",
-      "requires": {
-        "escape-string-regexp": "^1.0.3",
-        "extend": "^3.0.1",
-        "postcss": "^6.0.8"
-      }
-    },
     "postcss-load-config": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/postcss-load-config/-/postcss-load-config-2.0.0.tgz",
@@ -5363,15 +5347,9 @@
       "integrity": "sha1-2kL0l0DAtC2yypcoVxyxkMmO/qM="
     },
     "shell-quote": {
-      "version": "1.6.1",
-      "resolved": "https://registry.npmjs.org/shell-quote/-/shell-quote-1.6.1.tgz",
-      "integrity": "sha1-9HgZSczkAmlxJ0MOo7PFR29IF2c=",
-      "requires": {
-        "array-filter": "~0.0.0",
-        "array-map": "~0.0.0",
-        "array-reduce": "~0.0.0",
-        "jsonify": "~0.0.0"
-      }
+      "version": "1.7.3",
+      "resolved": "https://registry.npmjs.org/shell-quote/-/shell-quote-1.7.3.tgz",
+      "integrity": "sha512-Vpfqwm4EnqGdlsBFNmHhxhElJYrdfcxPThu+ryKS5J8L/fhAwLazFZtq+S+TWZ9ANj2piSQLGj6NQg+lKPmxrw=="
     },
     "slash": {
       "version": "1.0.0",