diff --git a/package-lock.json b/package-lock.json
index d3c43bb..ebd6344 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1280,6 +1280,7 @@
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       "dev": true,
+      "optional": true,
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@@ -2569,7 +2570,8 @@
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       "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
-      "dev": true
+      "dev": true,
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@@ -3000,7 +3002,8 @@
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       "integrity": "sha1-hMbhWbgZBP3KWaDvRM2HDTElD5o=",
-      "dev": true
+      "dev": true,
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@@ -3154,18 +3157,32 @@
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-      "integrity": "sha512-BsXLz5sqX8OHcsh7CqBMztyXARmGQ3LWPtGjJi6DiJHq5C/qvi9P3OqgswKSDftbu8+IoI/QDTAm2fFnQ9SZSQ==",
+      "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": {
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-        "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"
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+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
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+          "dev": true
+        },
+        "inherits": {
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+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+          "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
+          "dev": true
+        }
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@@ -4017,7 +4034,8 @@
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-          "dev": true
+          "dev": true,
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@@ -4038,12 +4056,14 @@
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-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "1.1.11",
           "bundled": true,
           "dev": true,
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@@ -4058,17 +4078,20 @@
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           "version": "1.1.0",
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           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
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           "version": "1.1.0",
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-          "dev": true
+          "dev": true,
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@@ -4185,7 +4208,8 @@
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-          "dev": true
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@@ -4197,6 +4221,7 @@
           "version": "1.0.0",
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           "dev": true,
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@@ -4211,6 +4236,7 @@
           "version": "3.0.4",
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           "dev": true,
+          "optional": true,
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@@ -4218,12 +4244,14 @@
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           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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           "version": "2.3.5",
           "bundled": true,
           "dev": true,
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@@ -4242,6 +4270,7 @@
           "version": "0.5.1",
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@@ -4322,7 +4351,8 @@
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-          "dev": true
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@@ -4334,6 +4364,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
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@@ -4419,7 +4450,8 @@
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           "version": "5.1.2",
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-          "dev": true
+          "dev": true,
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@@ -4455,6 +4487,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
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@@ -4474,6 +4507,7 @@
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           "bundled": true,
           "dev": true,
+          "optional": true,
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@@ -4517,12 +4551,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
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         "yallist": {
           "version": "3.0.3",
           "bundled": true,
-          "dev": true
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@@ -4531,6 +4567,7 @@
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       "dev": true,
+      "optional": true,
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@@ -4575,6 +4612,7 @@
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       "integrity": "sha1-LANAXHU4w51+s3sxcCLjJfsBi/c=",
       "dev": true,
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@@ -4590,13 +4628,15 @@
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           "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
-          "dev": true
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           "integrity": "sha1-754xOG8DGn8NZDr4L95QxFfvAMs=",
           "dev": true,
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@@ -4606,6 +4646,7 @@
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           "integrity": "sha1-EYvfW4zcUaKn5w0hHgfisLmxB9M=",
           "dev": true,
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@@ -4617,6 +4658,7 @@
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           "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
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@@ -4649,7 +4691,8 @@
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       "integrity": "sha1-uWjGsKBDhDJJAui/Gl3zJXmkUP4=",
-      "dev": true
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@@ -4860,7 +4903,8 @@
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-      "dev": true
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+      "optional": true
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@@ -5524,7 +5568,8 @@
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       "integrity": "sha1-Sw2hRCEE0bM2NA6AeX6GXPOffXI=",
-      "dev": true
+      "dev": true,
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@@ -6155,6 +6200,7 @@
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       "integrity": "sha1-lWkFcI1YtLq0wiYbBPWfMcmTdMA=",
       "dev": true,
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@@ -6167,7 +6213,8 @@
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-      "dev": true
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       "integrity": "sha1-9f+qXs0pyzHAR0vKfXVra7KePyg=",
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-          "dev": true
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       "integrity": "sha1-nWPBMnbAZZGNV/ACpX9AobZD+wI=",
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           "integrity": "sha1-ay6YIrGizgpgq2TWEOzK1TyyTQ8=",
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@@ -8268,6 +8322,7 @@
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@@ -9613,6 +9668,7 @@
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       "integrity": "sha1-YhmoVhZSBJHzV4i9vxRHqZx+aw4=",
       "dev": true,
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@@ -10946,6 +11002,7 @@
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       "dev": true,
+      "optional": true,
       "requires": {
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       }