diff --git a/package-lock.json b/package-lock.json
index c348d5f..faa0f5a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1708,15 +1708,15 @@
     "compression": {
       "version": "1.7.0",
       "resolved": "https://registry.npmjs.org/compression/-/compression-1.7.0.tgz",
-      "integrity": "sha1-AwyfGY8WQ6BX13anOOki2kNzAS0=",
+      "integrity": "sha512-EzpIPZX++rTQylMht3iaYigq2NNJbI/e9VaDzR8sLi8vgOCHpvLT93GuvsGYW2ANEd14Ax2nI1Ydi9L5ykGeig==",
       "requires": {
-        "accepts": "1.3.3",
+        "accepts": "~1.3.3",
         "bytes": "2.5.0",
-        "compressible": "2.0.11",
+        "compressible": "~2.0.10",
         "debug": "2.6.8",
-        "on-headers": "1.0.1",
+        "on-headers": "~1.0.1",
         "safe-buffer": "5.1.1",
-        "vary": "1.1.1"
+        "vary": "~1.1.1"
       }
     },
     "concat-map": {
@@ -2174,7 +2174,7 @@
     "debug": {
       "version": "2.6.8",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.8.tgz",
-      "integrity": "sha1-5zFTHKLt4n0YgiJCfaF4IdaP9Pw=",
+      "integrity": "sha512-E22fsyWPt/lr4/UgQLt/pXqerGMDsanhbnmqIS3VAXuDi1v3IpiwXe2oncEIondHSBuPDWRoK/pMjlvi8FuOXQ==",
       "requires": {
         "ms": "2.0.0"
       }
@@ -2928,47 +2928,47 @@
     "express": {
       "version": "4.15.4",
       "resolved": "https://registry.npmjs.org/express/-/express-4.15.4.tgz",
-      "integrity": "sha1-Ay4iU0ic+PzgJma+yj0R7XotrtE=",
+      "integrity": "sha512-g48YBFQpZMDOGe/l9rOUinTcSBAtHVH17+0iFp/nwIP9Ik5thohP0feDe4M748aCOrlA7mC99mlUlbpxdZcq9w==",
       "requires": {
-        "accepts": "1.3.3",
+        "accepts": "~1.3.3",
         "array-flatten": "1.1.1",
         "content-disposition": "0.5.2",
-        "content-type": "1.0.2",
+        "content-type": "~1.0.2",
         "cookie": "0.3.1",
         "cookie-signature": "1.0.6",
         "debug": "2.6.8",
-        "depd": "1.1.1",
-        "encodeurl": "1.0.1",
-        "escape-html": "1.0.3",
-        "etag": "1.8.0",
-        "finalhandler": "1.0.4",
+        "depd": "~1.1.1",
+        "encodeurl": "~1.0.1",
+        "escape-html": "~1.0.3",
+        "etag": "~1.8.0",
+        "finalhandler": "~1.0.4",
         "fresh": "0.5.0",
         "merge-descriptors": "1.0.1",
-        "methods": "1.1.2",
-        "on-finished": "2.3.0",
-        "parseurl": "1.3.1",
+        "methods": "~1.1.2",
+        "on-finished": "~2.3.0",
+        "parseurl": "~1.3.1",
         "path-to-regexp": "0.1.7",
-        "proxy-addr": "1.1.5",
+        "proxy-addr": "~1.1.5",
         "qs": "6.5.0",
-        "range-parser": "1.2.0",
+        "range-parser": "~1.2.0",
         "send": "0.15.4",
         "serve-static": "1.12.4",
         "setprototypeof": "1.0.3",
-        "statuses": "1.3.1",
-        "type-is": "1.6.15",
+        "statuses": "~1.3.1",
+        "type-is": "~1.6.15",
         "utils-merge": "1.0.0",
-        "vary": "1.1.1"
+        "vary": "~1.1.1"
       },
       "dependencies": {
         "array-flatten": {
           "version": "1.1.1",
           "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
-          "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
+          "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
         },
         "path-to-regexp": {
           "version": "0.1.7",
           "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-0.1.7.tgz",
-          "integrity": "sha1-32BBeABfUi8V60SQ5yR6G/qmf4w="
+          "integrity": "sha512-5DFkuoqlv1uYQKxy8omFBeJPQcdoE07Kv2sferDCrAq1ohOU+MSDswDIbnx3YAM60qIOnYa53wBhXW0EbMonrQ=="
         },
         "qs": {
           "version": "6.5.0",
@@ -3401,14 +3401,6 @@
             }
           }
         },
-        "debug": {
-          "version": "2.6.8",
-          "bundled": true,
-          "optional": true,
-          "requires": {
-            "ms": "2.0.0"
-          }
-        },
         "deep-extend": {
           "version": "0.4.2",
           "bundled": true,
@@ -3708,8 +3700,7 @@
         },
         "ms": {
           "version": "2.0.0",
-          "bundled": true,
-          "optional": true
+          "bundled": true
         },
         "node-pre-gyp": {
           "version": "0.6.36",
@@ -8423,15 +8414,15 @@
     "serve-index": {
       "version": "1.9.0",
       "resolved": "https://registry.npmjs.org/serve-index/-/serve-index-1.9.0.tgz",
-      "integrity": "sha1-0rKA/FYNYW7oG0i/D6gqvtJIXOc=",
+      "integrity": "sha512-btXPFKITJiodQ9CaH6RrvVFMNAT8TcYz5DHpXdtY/7rpG5EXUV5Bw8Pu8GVUzCHlkEXOhEOLntXLzMhirMsBXw==",
       "requires": {
-        "accepts": "1.3.3",
+        "accepts": "~1.3.3",
         "batch": "0.6.1",
         "debug": "2.6.8",
-        "escape-html": "1.0.3",
-        "http-errors": "1.6.2",
-        "mime-types": "2.1.16",
-        "parseurl": "1.3.1"
+        "escape-html": "~1.0.3",
+        "http-errors": "~1.6.1",
+        "mime-types": "~2.1.15",
+        "parseurl": "~1.3.1"
       }
     },
     "serve-static": {