[Feature] Support arm64 based cpu for macOS

[huikaihoo]

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Cannot use in arm64 based cpu for macOS. Any plan on support it?
Thanks.

$ krew install grep
Updated the local copy of plugin index.
Installing plugin: grep
W0905 09:22:33.335262   47104 install.go:164] failed to install plugin "grep": plugin "grep" does not offer installation for this platform
failed to install some plugins: [grep]: plugin "grep" does not offer installation for this platform

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[guessi]

@huikaihoo thanks for highlight that issue, I will tried to build for arm based at next release.

[guessi]

@huikaihoo I just released v1.8.0, and I hope it works for you. Note that before kubernetes-sigs/krew-index#2569 get merged, you will need to download the binary manually.

Let me know if it works for you, thanks!