Important Notes:

• metadata: use go embed instead of go-bindata for metadata files
  • reduce memory usage and improve compile speed up 6x(from 24mins to 4mins).
• feature: add credentials uri support
  • you can get credentials by local/remote URI now.

Others:

• cleanup: remove useless method for yaml
• cleanup: remove go-bindata
• test: upgrade go to 1.16 for CI