fix: upgrade mustache from 3.1.0 to 3.2.1

Snyk has created this PR to upgrade mustache from 3.1.0 to 3.2.1.

See this package in NPM:
https://www.npmjs.com/package/mustache

See this project in Snyk:
https://app.snyk.io/org/bluewallet/project/29c066bc-abce-44d9-b68e-064466e610e7?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -30,7 +30,7 @@
     "ioredis": "^4.15.1",
     "jayson": "^2.1.0",
     "morgan": "^1.9.1",
-    "mustache": "^3.0.1",
+    "mustache": "^3.2.1",
     "node-uuid": "^1.4.8",
     "prettier": "^1.19.1",
     "request": "^2.88.0",