Build - cache electron-builder in appveyor

electron-userland/electron-builder#1859 (comment)
https://ci.appveyor.com/project/costlockerbot/desktop/build/1.0.46/job/rq91al8t01lew11a
Get https://...: dial tcp 52.216.229.251:443: connectex: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.

appveyor.yml

@@ -6,6 +6,7 @@ platform:
 cache:
   - node_modules
   - '%USERPROFILE%\.electron'
+  - '%LOCALAPPDATA%\electron-builder'
 
 init:
   - git config --global core.autocrlf input
@@ -18,7 +19,6 @@ build_script:
   - npm run "package-win-%PLATFORM%"
 
 after_build:
-  - dir dist
   - ps: Get-ChildItem "dist\Costlocker*.exe" | Rename-Item -NewName { $_.Name -replace ' ','-' }
   - dir dist