fix: libs/combined/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-ELLIPTIC-14908844
- https://snyk.io/vuln/SNYK-JS-LODASH-15053838

libs/combined/package.json

@@ -18,7 +18,7 @@
     "create-hash": "^1.2.0",
     "ed25519-hd-key": "^1.0.0",
     "elastos-wallet-js": "git://github.com/johnnynanjiang/Elastos.SDK.Keypair.Javascript.git#491dc51b64efaf0a8aae62028b68e2c8e38fde06",
-    "ethereumjs-util": "6.2.1",
+    "ethereumjs-util": "7.0.2",
     "fast-levenshtein": "2.0.6",
     "groestlcoinjs-lib": "git://github.com/Groestlcoin/groestlcoinjs-lib.git#3.3.2",
     "handshake-util": "1.2.0",
@@ -27,7 +27,7 @@
     "kjua": "0.6.0",
     "nanocurrency-web": "^1.2.2",
     "nebulas": "0.5.6",
-    "stellar-base": "^0.10.0",
+    "stellar-base": "^13.1.0",
     "unorm": "1.6.0",
     "zxcvbn": "4.4.2"
   },