diff --git a/package-lock.json b/package-lock.json
index 88b6ad8..dadcd6d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -2982,17 +2982,24 @@
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-      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.0.tgz",
-      "integrity": "sha512-eFOJTMyCYb7xtE/caJ6JJu+bhi67WCYNbkGSknu20pmM8Ke/bqOfdnZWxyoGN26JgfxTbXrsCkEw4KheCT/KGg==",
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+      "resolved": "https://registry.npmjs.org/elliptic/-/elliptic-6.5.4.tgz",
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       "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": {
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+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
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+        }
       }
     },
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-          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8="
+          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
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           "version": "1.2.0",
@@ -3677,12 +3685,14 @@
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           "version": "1.0.0",
           "resolved": false,
-          "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c="
+          "integrity": "sha1-ibTRmasr7kneFk6gK4nORi1xt2c=",
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+          "optional": true,
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@@ -3697,17 +3707,20 @@
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           "resolved": false,
-          "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c="
+          "integrity": "sha1-DQcLTQQ6W+ozovGkDi7bPZpMz3c=",
+          "optional": true
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         "concat-map": {
           "version": "0.0.1",
           "resolved": false,
-          "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s="
+          "integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
+          "optional": true
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         "console-control-strings": {
           "version": "1.1.0",
           "resolved": false,
-          "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4="
+          "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
+          "optional": true
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@@ -3824,7 +3837,8 @@
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           "version": "2.0.3",
           "resolved": false,
-          "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4="
+          "integrity": "sha1-Yzwsg+PaQqUC9SRmAiSA9CCCYd4=",
+          "optional": true
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@@ -3836,6 +3850,7 @@
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           "resolved": false,
           "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
+          "optional": true,
           "requires": {
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@@ -3850,6 +3865,7 @@
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+          "optional": true,
           "requires": {
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@@ -3857,12 +3873,14 @@
         "minimist": {
           "version": "0.0.8",
           "resolved": false,
-          "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0="
+          "integrity": "sha1-hX/Kv8M5fSYluCKCYuhqp6ARsF0=",
+          "optional": true
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             "yallist": "^3.0.0"
@@ -3881,6 +3899,7 @@
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           "resolved": false,
           "integrity": "sha1-MAV0OOrGz3+MR2fzhkjWaX11yQM=",
+          "optional": true,
           "requires": {
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@@ -3961,7 +3980,8 @@
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           "resolved": false,
-          "integrity": "sha1-CXtgK1NCKlIsGvuHkDGDNpQaAR0="
+          "integrity": "sha1-CXtgK1NCKlIsGvuHkDGDNpQaAR0=",
+          "optional": true
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         "object-assign": {
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@@ -3973,6 +3993,7 @@
           "version": "1.4.0",
           "resolved": false,
           "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -4058,7 +4079,8 @@
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+          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
+          "optional": true
         },
         "safer-buffer": {
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@@ -4094,6 +4116,7 @@
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           "resolved": false,
           "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
+          "optional": true,
           "requires": {
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@@ -4113,6 +4136,7 @@
           "version": "3.0.1",
           "resolved": false,
           "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -4156,12 +4180,14 @@
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           "version": "1.0.2",
           "resolved": false,
-          "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+          "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+          "optional": true
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         "yallist": {
           "version": "3.0.3",
           "resolved": false,
-          "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A=="
+          "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A==",
+          "optional": true
         }
       }
     },