diff --git a/package-lock.json b/package-lock.json
index c6be705..45f0942 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2199,6 +2199,36 @@
             "sha.js": "^2.4.8"
          }
       },
+      "cross-env": {
+         "version": "5.2.1",
+         "resolved": "https://registry.npmjs.org/cross-env/-/cross-env-5.2.1.tgz",
+         "integrity": "sha512-1yHhtcfAd1r4nwQgknowuUNfIT9E8dOMMspC36g45dN+iD1blloi7xp8X/xAIDnjHWyt1uQ8PHk2fkNaym7soQ==",
+         "dev": true,
+         "requires": {
+            "cross-spawn": "^6.0.5"
+         },
+         "dependencies": {
+            "cross-spawn": {
+               "version": "6.0.5",
+               "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-6.0.5.tgz",
+               "integrity": "sha512-eTVLrBSt7fjbDygz805pMnstIs2VTBNkRm0qxZd+M7A5XDdxVRWO5MxGBXZhjY4cqLYLdtrGqRf8mBPmzwSpWQ==",
+               "dev": true,
+               "requires": {
+                  "nice-try": "^1.0.4",
+                  "path-key": "^2.0.1",
+                  "semver": "^5.5.0",
+                  "shebang-command": "^1.2.0",
+                  "which": "^1.2.9"
+               }
+            },
+            "semver": {
+               "version": "5.7.1",
+               "resolved": "https://registry.npmjs.org/semver/-/semver-5.7.1.tgz",
+               "integrity": "sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==",
+               "dev": true
+            }
+         }
+      },
       "cross-spawn": {
          "version": "3.0.1",
          "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-3.0.1.tgz",
@@ -2374,9 +2404,9 @@
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       },
       "css-what": {
-         "version": "2.1.0",
-         "resolved": "https://registry.npmjs.org/css-what/-/css-what-2.1.0.tgz",
-         "integrity": "sha1-lGfQMsOM+u+58teVASUwYvh/ob0=",
+         "version": "2.1.3",
+         "resolved": "https://registry.npmjs.org/css-what/-/css-what-2.1.3.tgz",
+         "integrity": "sha512-a+EPoD+uZiNfh+5fxw2nO9QwFa6nJe2Or35fGY6Ipw1R3R4AGz1d1TEZrCegvw2YTmZ0jXirGYlzxxpYSHwpEg==",
          "dev": true
       },
       "cssesc": {
@@ -6310,6 +6340,12 @@
          "integrity": "sha1-KzJxhOiZIQEXeyhWP7XnECrNDKk=",
          "dev": true
       },
+      "nice-try": {
+         "version": "1.0.5",
+         "resolved": "https://registry.npmjs.org/nice-try/-/nice-try-1.0.5.tgz",
+         "integrity": "sha512-1nh45deeb5olNY7eX82BkPO7SSxR5SSYJiPTrTdFUVYwAl8CKMA5N9PjTYkHiRjisVcxcQ1HXdLhx2qxxJzLNQ==",
+         "dev": true
+      },
       "no-case": {
          "version": "2.3.2",
          "resolved": "https://registry.npmjs.org/no-case/-/no-case-2.3.2.tgz",
@@ -7278,6 +7314,12 @@
          "integrity": "sha1-NlQX3t5EQw0cEa9hAn+s8HS9/FM=",
          "dev": true
       },
+      "path-key": {
+         "version": "2.0.1",
+         "resolved": "https://registry.npmjs.org/path-key/-/path-key-2.0.1.tgz",
+         "integrity": "sha512-fEHGKCSmUSDPv4uoj8AlD+joPlq3peND+HRYyxFz4KPw4z926S/b8rIuFs2FYJg3BwsxJf6A9/3eIdLaYC+9Dw==",
+         "dev": true
+      },
       "path-parse": {
          "version": "1.0.5",
          "resolved": "https://registry.npmjs.org/path-parse/-/path-parse-1.0.5.tgz",
@@ -10080,6 +10122,21 @@
             }
          }
       },
+      "shebang-command": {
+         "version": "1.2.0",
+         "resolved": "https://registry.npmjs.org/shebang-command/-/shebang-command-1.2.0.tgz",
+         "integrity": "sha512-EV3L1+UQWGor21OmnvojK36mhg+TyIKDh3iFBKBohr5xeXIhNBcx8oWdgkTEEQ+BEFFYdLRuqMfd5L84N1V5Vg==",
+         "dev": true,
+         "requires": {
+            "shebang-regex": "^1.0.0"
+         }
+      },
+      "shebang-regex": {
+         "version": "1.0.0",
+         "resolved": "https://registry.npmjs.org/shebang-regex/-/shebang-regex-1.0.0.tgz",
+         "integrity": "sha512-wpoSFAxys6b2a2wHZ1XpDSgD7N9iVjg29Ph9uV/uaP9Ex/KXlkTZTeddxDPSYQpgvzKLGJke2UU0AzoGCjNIvQ==",
+         "dev": true
+      },
       "shelljs": {
          "version": "0.7.8",
          "resolved": "https://registry.npmjs.org/shelljs/-/shelljs-0.7.8.tgz",