diff --git a/package-lock.json b/package-lock.json
index c993182..4a1a11d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -30,15 +30,16 @@
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/adler-32/-/adler-32-1.2.0.tgz",
       "integrity": "sha1-aj5r8KY5ALoVZSgIyxXGgT0aXyU=",
+      "optional": true,
       "requires": {
         "exit-on-epipe": "~1.0.1",
         "printj": "~1.1.0"
       }
     },
     "ajv": {
-      "version": "6.11.0",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.11.0.tgz",
-      "integrity": "sha512-nCprB/0syFYy9fVYU1ox1l2KN8S9I+tziH8D4zdZuLT3N6RMlGSGt5FSTpAiHB/Whv8Qs1cWHma1aMKZyaHRKA==",
+      "version": "6.12.6",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
       "dev": true,
       "requires": {
         "fast-deep-equal": "^3.1.1",
@@ -1138,6 +1139,7 @@
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/crc-32/-/crc-32-1.2.0.tgz",
       "integrity": "sha512-1uBwHxF+Y/4yF5G48fwnKq6QsIXheor3ZLPT80yGBV1oEUwpPojlEhQbWKVw1VwcTQyMGHK1/XMmTjmlsmTTGA==",
+      "optional": true,
       "requires": {
         "exit-on-epipe": "~1.0.1",
         "printj": "~1.1.0"
@@ -1457,7 +1459,8 @@
     "exit-on-epipe": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/exit-on-epipe/-/exit-on-epipe-1.0.1.tgz",
-      "integrity": "sha512-h2z5mrROTxce56S+pnvAV890uu7ls7f1kEvVGJbw1OlFH3/mlJ5bkXu0KRyW94v37zzHPiUd55iLn3DA7TjWpw=="
+      "integrity": "sha512-h2z5mrROTxce56S+pnvAV890uu7ls7f1kEvVGJbw1OlFH3/mlJ5bkXu0KRyW94v37zzHPiUd55iLn3DA7TjWpw==",
+      "optional": true
     },
     "expand-brackets": {
       "version": "0.1.5",
@@ -2591,7 +2594,8 @@
     "printj": {
       "version": "1.1.2",
       "resolved": "http://registry.npmjs.org/printj/-/printj-1.1.2.tgz",
-      "integrity": "sha512-zA2SmoLaxZyArQTOPj5LXecR+RagfPSU5Kw1qP+jkWeNlrq+eJZyY2oS68SU1Z/7/myXM4lo9716laOFAVStCQ=="
+      "integrity": "sha512-zA2SmoLaxZyArQTOPj5LXecR+RagfPSU5Kw1qP+jkWeNlrq+eJZyY2oS68SU1Z/7/myXM4lo9716laOFAVStCQ==",
+      "optional": true
     },
     "private": {
       "version": "0.1.8",
@@ -3569,7 +3573,8 @@
     "voc": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/voc/-/voc-1.1.0.tgz",
-      "integrity": "sha512-fthgd8OJLqq8vPcLjElTk6Rcl2e3v5ekcXauImaqEnQqd5yUWKg1+ZOBgS2KTWuVKcuvZMQq4TDptiT1uYddUA=="
+      "integrity": "sha512-fthgd8OJLqq8vPcLjElTk6Rcl2e3v5ekcXauImaqEnQqd5yUWKg1+ZOBgS2KTWuVKcuvZMQq4TDptiT1uYddUA==",
+      "optional": true
     },
     "webcharts": {
       "version": "1.11.1",