diff --git a/package-lock.json b/package-lock.json
old mode 100755
new mode 100644
index cda4f3a..9ce12a3
--- a/package-lock.json
+++ b/package-lock.json
@@ -1076,7 +1076,7 @@
         },
         "chalk": {
             "version": "1.1.3",
-            "resolved": "http://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
+            "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
             "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
             "dev": true,
             "requires": {
@@ -2244,18 +2244,32 @@
             "dev": true
         },
         "elliptic": {
-            "version": "6.5.2",
-            "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.2.tgz",
-            "integrity": "sha512-f4x70okzZbIQl/NSRLkI/+tteV/9WqL98zx+SQ69KbXxmVrmjwsNUPn/gYJJ0sHvEak24cZgHIPegRePAtA/xw==",
+            "version": "6.5.4",
+            "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
+            "integrity": "sha512-iLhC6ULemrljPZb+QutR5TQGB+pdW6KGD5RSegS+8sorOZT+rdQFbsQFJgvN3eRqNALqJer4oQ16YvJHlU8hzQ==",
             "dev": true,
             "requires": {
-                "bn.js": "^4.4.0",
-                "brorand": "^1.0.1",
+                "bn.js": "^4.11.9",
+                "brorand": "^1.1.0",
                 "hash.js": "^1.0.0",
-                "hmac-drbg": "^1.0.0",
-                "inherits": "^2.0.1",
-                "minimalistic-assert": "^1.0.0",
-                "minimalistic-crypto-utils": "^1.0.0"
+                "hmac-drbg": "^1.0.1",
+                "inherits": "^2.0.4",
+                "minimalistic-assert": "^1.0.1",
+                "minimalistic-crypto-utils": "^1.0.1"
+            },
+            "dependencies": {
+                "bn.js": {
+                    "version": "4.12.0",
+                    "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
+                    "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==",
+                    "dev": true
+                },
+                "inherits": {
+                    "version": "2.0.4",
+                    "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+                    "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
+                    "dev": true
+                }
             }
         },
         "emoji-regex": {
@@ -3401,7 +3415,7 @@
         },
         "is-accessor-descriptor": {
             "version": "0.1.6",
-            "resolved": "http://registry.npmjs.org/is-accessor-descriptor/-/is-accessor-descriptor-0.1.6.tgz",
+            "resolved": "https://registry.npmjs.org/is-accessor-descriptor/-/is-accessor-descriptor-0.1.6.tgz",
             "integrity": "sha1-qeEss66Nh2cn7u84Q/igiXtcmNY=",
             "dev": true,
             "requires": {
@@ -3451,7 +3465,7 @@
         },
         "is-data-descriptor": {
             "version": "0.1.4",
-            "resolved": "http://registry.npmjs.org/is-data-descriptor/-/is-data-descriptor-0.1.4.tgz",
+            "resolved": "https://registry.npmjs.org/is-data-descriptor/-/is-data-descriptor-0.1.4.tgz",
             "integrity": "sha1-C17mSDiOLIYCgueT8YVv7D8wG1Y=",
             "dev": true,
             "requires": {
@@ -3671,7 +3685,7 @@
         },
         "json5": {
             "version": "0.5.1",
-            "resolved": "http://registry.npmjs.org/json5/-/json5-0.5.1.tgz",
+            "resolved": "https://registry.npmjs.org/json5/-/json5-0.5.1.tgz",
             "integrity": "sha1-Hq3nrMASA0rYTiOWdn6tn6VJWCE=",
             "dev": true
         },
@@ -4469,7 +4483,7 @@
         },
         "os-locale": {
             "version": "1.4.0",
-            "resolved": "http://registry.npmjs.org/os-locale/-/os-locale-1.4.0.tgz",
+            "resolved": "https://registry.npmjs.org/os-locale/-/os-locale-1.4.0.tgz",
             "integrity": "sha1-IPnxeuKe00XoveWDsT0gCYA8FNk=",
             "dev": true,
             "requires": {
@@ -4675,7 +4689,7 @@
         },
         "pify": {
             "version": "2.3.0",
-            "resolved": "http://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
+            "resolved": "https://registry.npmjs.org/pify/-/pify-2.3.0.tgz",
             "integrity": "sha1-7RQaasBDqEnqWISY59yosVMw6Qw=",
             "dev": true
         },
@@ -5327,7 +5341,7 @@
             "dependencies": {
                 "convert-source-map": {
                     "version": "0.3.5",
-                    "resolved": "http://registry.npmjs.org/convert-source-map/-/convert-source-map-0.3.5.tgz",
+                    "resolved": "https://registry.npmjs.org/convert-source-map/-/convert-source-map-0.3.5.tgz",
                     "integrity": "sha1-8dgClQr33SYxof6+BZZVDIarMZA=",
                     "dev": true
                 }
@@ -6135,7 +6149,7 @@
         },
         "string-width": {
             "version": "1.0.2",
-            "resolved": "http://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
+            "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
             "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
             "dev": true,
             "requires": {
@@ -6155,7 +6169,7 @@
         },
         "strip-ansi": {
             "version": "3.0.1",
-            "resolved": "http://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+            "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
             "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
             "dev": true,
             "requires": {
@@ -6198,7 +6212,7 @@
         },
         "supports-color": {
             "version": "2.0.0",
-            "resolved": "http://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
+            "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
             "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
             "dev": true
         },
@@ -6578,7 +6592,7 @@
         },
         "util": {
             "version": "0.10.3",
-            "resolved": "http://registry.npmjs.org/util/-/util-0.10.3.tgz",
+            "resolved": "https://registry.npmjs.org/util/-/util-0.10.3.tgz",
             "integrity": "sha1-evsa/lCAUkZInj23/g7TeTNqwPk=",
             "dev": true,
             "requires": {
@@ -7063,7 +7077,7 @@
         },
         "wrap-ansi": {
             "version": "2.1.0",
-            "resolved": "http://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
+            "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-2.1.0.tgz",
             "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
             "dev": true,
             "requires": {