fix: packages/blockchain-wallet-v4-frontend/package.json to reduce vu…

…lnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-REACTTOOLTIP-72363
- https://snyk.io/vuln/npm:react-dom:20180802

packages/blockchain-wallet-v4-frontend/package.json

@@ -119,7 +119,7 @@
     "react-animations": "1.0.0",
     "react-copy-to-clipboard": "5.0.1",
     "react-csv": "1.0.14",
-    "react-dom": "16.4.0",
+    "react-dom": "16.4.2",
     "react-dropzone": "^6.0.0",
     "react-highcharts": "16.0.2",
     "react-intl": "2.4.0",
@@ -129,7 +129,7 @@
     "react-redux": "5.0.7",
     "react-router-bootstrap": "0.24.4",
     "react-router-dom": "4.1.1",
-    "react-tooltip": "3.8.0",
+    "react-tooltip": "3.8.1",
     "react-transition-group": "2.2.1",
     "react-webcam": "0.5.0",
     "read-blob": "1.1.0",