v2.0.0-alpha.1

• Upgrade to node 14
• Use node-fetch for all HTTP request
• Upgrade to typescript 4 & webpack 5
• Upgrade @magda dependencies to v2
• Fix #10: retry the request when 0 count received for package_search request
• Release all artifacts to GitHub Container Registry (instead of docker.io & https://charts.magda.io)
• Fixed a issue in v2.0.0-alpha.0: incorrect default registry. Should be ghcr.io/magda-io
• Upgrade API version for CronJob to batch/v1 (for k8s v1.25 support)