Update react/react-dom to 16.13.0 and docgen to 5.3.0 [ref dash#1531] (#117)

This pull request is for updating the docstring comments so they will be compatible with the new style docstrings in dash #1531

Author: AnnMarieW

package.json

@@ -40,9 +40,9 @@
     "cytoscape-svg": "0.2.0",
     "lodash": "^4.17.11",
     "ramda": "^0.25.0",
-    "react": "15.4.2",
+    "react": "^16.13.1",
     "react-cytoscapejs": "1.2.1",
-    "react-dom": "15.4.2"
+    "react-dom": "^16.13.1"
   },
   "devDependencies": {
     "babel-core": "^6.26.3",
@@ -57,7 +57,7 @@
     "eslint-plugin-import": "^2.12.0",
     "eslint-plugin-react": "^7.9.1",
     "npm": "^6.14.4",
-    "react-docgen": "^2.21.0",
+    "react-docgen": "^5.3.0",
     "style-loader": "^0.21.0",
     "webpack": "^4.20.2",
     "webpack-cli": "^3.1.1",