Update makefile (oras-project#423)

Signed-off-by: Billy Zha <qweeah@gmail.com>

Update dependency

Signed-off-by: Billy Zha <jinzha1@microsoft.com>

build v7

Signed-off-by: Billy Zha <jinzha1@microsoft.com>

Add arm32 builds for linux

Signed-off-by: Billy Zha <jinzha1@microsoft.com>

Add arm32 builds for linux

Signed-off-by: Billy Zha <jinzha1@microsoft.com>

Remove darwin

Signed-off-by: Billy Zha <jinzha1@microsoft.com>

Use github token

Signed-off-by: Billy Zha <jinzha1@microsoft.com>

Add unit tests for internal packages (oras-project#376)

Signed-off-by: Billy Zha <jinzha1@microsoft.com>

unify auth (oras-project#338)

Signed-off-by: Shiwei Zhang <shizh@microsoft.com>

Alpha implementation for oras-project/artifacts-spec#41