diff --git a/package-lock.json b/package-lock.json
index 708a726..fdb43b8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -747,6 +747,7 @@
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       "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
       "dev": true,
+      "optional": true,
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         "longest": "1.0.1",
@@ -758,6 +759,7 @@
           "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
           "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
           "dev": true,
+          "optional": true,
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           }
@@ -1378,6 +1380,7 @@
       "resolved": "https://registry.npmjs.org/boom/-/boom-2.10.1.tgz",
       "integrity": "sha1-OciRjO/1eZ+D+UkqhI9iWt0Mdm8=",
       "dev": true,
+      "optional": true,
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       }
@@ -2205,6 +2208,7 @@
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       "integrity": "sha1-O9/s3GCBR8HGcgL6KR59ylnqo7g=",
       "dev": true,
+      "optional": true,
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       }
@@ -3232,45 +3236,45 @@
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       "resolved": "https://registry.npmjs.org/express/-/express-4.16.3.tgz",
-      "integrity": "sha1-avilAjUNsyRuzEvs9rWjTSL37VM=",
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       "dev": true,
       "requires": {
-        "accepts": "1.3.5",
+        "accepts": "~1.3.5",
         "array-flatten": "1.1.1",
         "body-parser": "1.18.2",
         "content-disposition": "0.5.2",
-        "content-type": "1.0.4",
+        "content-type": "~1.0.4",
         "cookie": "0.3.1",
         "cookie-signature": "1.0.6",
         "debug": "2.6.9",
-        "depd": "1.1.2",
-        "encodeurl": "1.0.2",
-        "escape-html": "1.0.3",
-        "etag": "1.8.1",
+        "depd": "~1.1.2",
+        "encodeurl": "~1.0.2",
+        "escape-html": "~1.0.3",
+        "etag": "~1.8.1",
         "finalhandler": "1.1.1",
         "fresh": "0.5.2",
         "merge-descriptors": "1.0.1",
-        "methods": "1.1.2",
-        "on-finished": "2.3.0",
-        "parseurl": "1.3.2",
+        "methods": "~1.1.2",
+        "on-finished": "~2.3.0",
+        "parseurl": "~1.3.2",
         "path-to-regexp": "0.1.7",
-        "proxy-addr": "2.0.3",
+        "proxy-addr": "~2.0.3",
         "qs": "6.5.1",
-        "range-parser": "1.2.0",
+        "range-parser": "~1.2.0",
         "safe-buffer": "5.1.1",
         "send": "0.16.2",
         "serve-static": "1.13.2",
         "setprototypeof": "1.1.0",
-        "statuses": "1.4.0",
-        "type-is": "1.6.16",
+        "statuses": "~1.4.0",
+        "type-is": "~1.6.16",
         "utils-merge": "1.0.1",
-        "vary": "1.1.2"
+        "vary": "~1.1.2"
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           "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
-          "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI=",
+          "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg==",
           "dev": true
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@@ -3633,6 +3637,7 @@
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       "integrity": "sha1-XB+x8RdHcRTwYyoOtLcbPLD9MXE=",
       "dev": true,
+      "optional": true,
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         "inherits": "2.0.3",
@@ -4027,6 +4032,7 @@
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       "integrity": "sha1-B4REvXwWQLD+VA0sm3PVlnjo4cQ=",
       "dev": true,
+      "optional": true,
       "requires": {
         "boom": "2.10.1",
         "cryptiles": "2.0.5",
@@ -4055,7 +4061,8 @@
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       "resolved": "https://registry.npmjs.org/hoek/-/hoek-2.16.3.tgz",
       "integrity": "sha1-ILt0A9POo5jpHcRxCo/xuCdKJe0=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -5627,7 +5634,8 @@
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       "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=",
-      "dev": true
+      "dev": true,
+      "optional": true
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@@ -6249,7 +6257,8 @@
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           "integrity": "sha1-tDLdM1i2NM914eRmQ2gkBTPB3b4=",
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -6277,6 +6286,7 @@
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           "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
           "dev": true,
+          "optional": true,
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             "ansi-styles": "2.2.1",
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@@ -6362,7 +6372,8 @@
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           "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
-          "dev": true
+          "dev": true,
+          "optional": true
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@@ -8361,6 +8372,7 @@
       "resolved": "https://registry.npmjs.org/sntp/-/sntp-1.0.9.tgz",
       "integrity": "sha1-ZUEYTMkK7qbG57NeJlkIJEPGYZg=",
       "dev": true,
+      "optional": true,
       "requires": {
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       }
@@ -8802,7 +8814,8 @@
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-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "strip-ansi": {
       "version": "3.0.1",