Bump electron from 3.1.6 to 7.2.4 in /src/template

Bumps [electron](https://github.com/electron/electron) from 3.1.6 to 7.2.4.
- [Release notes](https://github.com/electron/electron/releases)
- [Changelog](https://github.com/electron/electron/blob/master/docs/breaking-changes.md)
- [Commits](electron/electron@v3.1.6...v7.2.4)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/template/package.json

@@ -5,7 +5,7 @@
   "license": "UNLICENSED",
   "private": true,
   "devDependencies": {
-    "electron": "6.0.1"
+    "electron": "7.2.4"
   },
   "dependencies": {
     "fs-extra": "^7.0.1",