- Use cache to store package versions
- Update actions/setup-go to v2
- Add go1.15-rc1 build
- Make seperate build step
- stop downloading code into special path
- leave adding ~/go/bin to PATH to sction/setup-go
- remove docker build from xgo as we are building rclone anyway
- remove modules setting since it is now always on
- use ./... instead of listing files in tests