chore: Enable shell executor for post-upgrade commands in renovate (#357)

Author: dylanlerch

renovate-config.js

@@ -25,6 +25,7 @@ module.exports = {
   onboarding: false,
   requireConfig: false,
   allowedPostUpgradeCommands: ['.*'],
+  allowShellExecutorForPostUpgradeCommands: true,
   postUpgradeTasks: {
     commands: ['npm install && npm run build'],
     fileFilters: ['**/index.js'],