fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-ELLIPTIC-1064899
- https://snyk.io/vuln/SNYK-JS-ELLIPTIC-511941
- https://snyk.io/vuln/SNYK-JS-ELLIPTIC-571484
- https://snyk.io/vuln/SNYK-JS-MINIMATCH-1019388
- https://snyk.io/vuln/SNYK-JS-MINIMATCH-3050818
- https://snyk.io/vuln/SNYK-JS-REQUEST-3361831
- https://snyk.io/vuln/SNYK-JS-SCHEMAINSPECTOR-1088010
- https://snyk.io/vuln/SNYK-JS-TOUGHCOOKIE-5672873
- https://snyk.io/vuln/SNYK-JS-TRIMNEWLINES-1298042
- https://snyk.io/vuln/SNYK-JS-VALIDATOR-1090599
- https://snyk.io/vuln/SNYK-JS-VALIDATOR-1090600
- https://snyk.io/vuln/SNYK-JS-VALIDATOR-1090601
- https://snyk.io/vuln/SNYK-JS-VALIDATOR-1090602
- https://snyk.io/vuln/SNYK-JS-WS-1296835
- https://snyk.io/vuln/npm:base64url:20180511
- https://snyk.io/vuln/npm:validator:20160218

package.json

@@ -28,8 +28,8 @@
     "reflux-tx": "0.2.4",
     "sass-loader": "^3.1.2",
     "style-loader": "^0.23.1",
-    "uport-lib": "^1.3.1",
-    "web3": "1.4.0",
+    "uport-lib": "^2.0.0",
+    "web3": "4.0.1",
     "webpack": "^5.0.0"
   },
   "devDependencies": {