Fix/lock lowdb file (#470)

* Lock data.json while running

* Await floating promises

* Increase retry frequency and attempt count for lock file

* tweak lock retry times

package.json

@@ -65,6 +65,8 @@
     "@types/node-fetch": "^2.5.10",
     "@types/node-forge": "^0.9.7",
     "@types/papaparse": "^5.2.5",
+    "@types/proper-lockfile": "^4.1.2",
+    "@types/retry": "^0.12.1",
     "@types/tldjs": "^2.3.0",
     "@types/zxcvbn": "^4.4.1",
     "clean-webpack-plugin": "^4.0.0",
@@ -107,6 +109,7 @@
     "node-forge": "0.10.0",
     "open": "^8.0.8",
     "papaparse": "^5.3.0",
+    "proper-lockfile": "^4.1.2",
     "rxjs": "6.6.7",
     "tldjs": "^2.3.1",
     "zxcvbn": "^4.4.2"