remove lowdb with electron-store

package.json

@@ -191,7 +191,6 @@
   "devDependencies": {
     "@angular/compiler-cli": "^7.2.1",
     "@ngtools/webpack": "^7.2.2",
-    "@types/lowdb": "^1.0.1",
     "@types/lunr": "^2.1.6",
     "@types/node-forge": "^0.7.5",
     "@types/papaparse": "^4.5.3",
@@ -250,9 +249,9 @@
     "desktop-idle": "1.1.2",
     "duo_web_sdk": "git+https://github.com/duosecurity/duo_web_sdk.git",
     "electron-log": "2.2.17",
+    "electron-store": "1.3.0",
     "electron-updater": "4.0.6",
     "keytar": "4.2.1",
-    "lowdb": "1.0.0",
     "lunr": "2.3.3",
     "node-forge": "0.7.6",
     "nord": "0.2.1",