Delete installed servers on startup if the bundled server is newer

This reduces incompatibility risk, and resolves some bugs with users
updating between current desktop versions.

Author: pimterry

package-lock.json

@@ -27,6 +27,8 @@
     "electron-first-run": "^3.0.0",
     "electron-squirrel-startup": "^1.0.0",
     "electron-window-state": "^5.0.3",
+    "rimraf": "^2.7.1",
+    "semver": "^7.2.1",
     "tslib": "^1.10.0",
     "universal-analytics": "^0.4.20",
     "uuid": "^3.3.3",
@@ -38,6 +40,7 @@
     "@types/lodash": "^4.14.149",
     "@types/node": "^12.12.14",
     "@types/node-fetch": "^2.1.4",
+    "@types/rimraf": "^3.0.0",
     "@types/universal-analytics": "^0.4.3",
     "@types/uuid": "^3.4.6",
     "@types/yargs": "^15.0.3",
@@ -50,7 +53,6 @@
     "httptoolkit-server": "^0.1.34",
     "lodash": "^4.17.15",
     "node-fetch": "^2.6.0",
-    "rimraf": "^2.6.3",
     "targz": "^1.0.1",
     "ts-node": "^7.0.1",
     "tslint": "^5.20.1",