diff --git a/package-lock.json b/package-lock.json
index 1ecbd3b..0c3f0eb 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -89,11 +89,6 @@
       "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
       "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk="
     },
-    "dotparser": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/dotparser/-/dotparser-1.0.0.tgz",
-      "integrity": "sha512-yIvKnnQbK8dhh6aN44xNPd00FuHWVygAW8iYW05DCgzGzHJfe/VaQQAoq3QBDAa8cMFS7Lub8SCAsej/lLUomQ=="
-    },
     "duplexer": {
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/duplexer/-/duplexer-0.1.1.tgz",
@@ -220,9 +215,9 @@
       "integrity": "sha1-peZUwuWi3rXyAdls77yoDA7y9RM="
     },
     "json-schema": {
-      "version": "0.2.3",
-      "resolved": "https://registry.npmjs.org/json-schema/-/json-schema-0.2.3.tgz",
-      "integrity": "sha1-tIDIkuWaLwWVTOcnvT8qTogvnhM="
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/json-schema/-/json-schema-0.4.0.tgz",
+      "integrity": "sha512-es94M3nTIfsEPisRafak+HDLfHXnKBhV3vU5eqPcS3flIWqcxJWgXHXiey3YrpaNsanY5ei1VoYEbOzijuq9BA=="
     },
     "json-schema-traverse": {
       "version": "0.4.1",
@@ -240,13 +235,13 @@
       "integrity": "sha1-P02uSpH6wxX3EGL4UhzCOfE2YoA="
     },
     "jsprim": {
-      "version": "1.4.1",
-      "resolved": "https://registry.npmjs.org/jsprim/-/jsprim-1.4.1.tgz",
-      "integrity": "sha1-MT5mvB5cwG5Di8G3SZwuXFastqI=",
+      "version": "1.4.2",
+      "resolved": "https://registry.npmjs.org/jsprim/-/jsprim-1.4.2.tgz",
+      "integrity": "sha512-P2bSOMAc/ciLz6DzgjVlGJP9+BrJWu5UDGK70C2iweC5QBIeFf0ZXRvGjEj2uYgrY2MkAAhsSWHDWlFtEroZWw==",
       "requires": {
         "assert-plus": "1.0.0",
         "extsprintf": "1.3.0",
-        "json-schema": "0.2.3",
+        "json-schema": "0.4.0",
         "verror": "1.10.0"
       }
     },
@@ -271,21 +266,14 @@
     "ngraph.events": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/ngraph.events/-/ngraph.events-1.2.1.tgz",
-      "integrity": "sha512-D4C+nXH/RFxioGXQdHu8ELDtC6EaCiNsZtih0IvyGN81OZSUby4jXoJ5+RNWasfsd0FnKxxpAROyUMzw64QNsw=="
-    },
-    "ngraph.fromdot": {
-      "version": "6.0.1",
-      "resolved": "https://registry.npmjs.org/ngraph.fromdot/-/ngraph.fromdot-6.0.1.tgz",
-      "integrity": "sha512-6ujENG4ZQ3OVAU9c4y5yD/T96YPEB+RXowIYps0dAM0NqoOzY4+spfsyJFOGrrAp3OCs1QRDKigQxq4L3Tam+Q==",
-      "requires": {
-        "dotparser": "^1.0.0",
-        "ngraph.graph": "^19.1.0"
-      }
+      "integrity": "sha512-D4C+nXH/RFxioGXQdHu8ELDtC6EaCiNsZtih0IvyGN81OZSUby4jXoJ5+RNWasfsd0FnKxxpAROyUMzw64QNsw==",
+      "dev": true
     },
     "ngraph.graph": {
       "version": "19.1.0",
       "resolved": "https://registry.npmjs.org/ngraph.graph/-/ngraph.graph-19.1.0.tgz",
       "integrity": "sha512-9cws84qfPkrYa7BaBtT+KgZfLXrd6pNL9Gl5Do+MBO/0Hm6rOM7qK78MZaO1uEoIK6p2pgUs6lu29zn/6tP59w==",
+      "dev": true,
       "requires": {
         "ngraph.events": "^1.2.1"
       }
@@ -295,13 +283,11 @@
       "resolved": "https://registry.npmjs.org/ngraph.random/-/ngraph.random-1.0.0.tgz",
       "integrity": "sha512-deLYx/kdrchInjD+S7IMCtLAyixWRXC3En9TI0KL2JbWIb8Z9SFv8UfSOLQppMBswy08aiYkoaucfLA7d8Ffcg=="
     },
-    "ngraph.weisfeiler-lehman": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/ngraph.weisfeiler-lehman/-/ngraph.weisfeiler-lehman-1.0.0.tgz",
-      "integrity": "sha512-A23p9ZUkR7rOZEIaImOoD1LAoUAxb+B8Kar0tyOIhlAmiIdxFgaXK4EWNYNewdhtFh5OKv31niWVmOEAwZE3+g==",
-      "requires": {
-        "ngraph.fromdot": "^6.0.1"
-      }
+    "ngraph.todot": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/ngraph.todot/-/ngraph.todot-3.0.2.tgz",
+      "integrity": "sha512-1Ck0OkjaQ3vDt5rwiSwLqCBWfXtpNL1qfq0fnJTx2jpjgzidje7s17mzxBonnK6D+vKsbbPdshUL1gBAfsSIIQ==",
+      "dev": true
     },
     "node-fetch": {
       "version": "2.6.0",