Bump electron from 6.0.9 to 6.0.10 in /app

Bumps [electron](https://github.com/electron/electron) from 6.0.9 to 6.0.10.
- [Release notes](https://github.com/electron/electron/releases)
- [Commits](https://github.com/electron/electron/compare/v6.0.9...v6.0.10)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

app/package.json

@@ -66,7 +66,7 @@
     "font-manager": "^0.3.0"
   },
   "devDependencies": {
-    "electron": "^6.0.0",
+    "electron": "^6.0.10",
     "electron-builder": "^21.1.5",
     "electron-rebuild": "^1.8.6",
     "readline-sync": "1.4.10"

app/yarn.lock

@@ -932,10 +932,10 @@ electron-rebuild@^1.8.6:
     spawn-rx "^3.0.0"
     yargs "^13.2.4"
 
-electron@^6.0.0:
-  version "6.0.9"
-  resolved "https://registry.yarnpkg.com/electron/-/electron-6.0.9.tgz#fea15e9fec329248db500b33ba6544a26fe025a3"
-  integrity sha512-lFpSmDNyjpvJFwEnK897Soone3DV7D3ASFUb315H2VTVZSbKib9Kbrsovxf4c+e1q5hTdaONsGIm3Lb4CXIW1g==
+electron@^6.0.10:
+  version "6.0.10"
+  resolved "https://registry.yarnpkg.com/electron/-/electron-6.0.10.tgz#3468547640c98ed46060711ca70f43d0b2e40818"
+  integrity sha512-eTFm6uTn7NKZE1OtSZSOxNuOrCXXeUR0U3vdF3R00byB7mrNe5AOaXEDDMwtzRGGY1jMuUX9Z7RvgXaCXRYSmw==
   dependencies:
     "@types/node" "^10.12.18"
     electron-download "^4.1.0"