metal : support for Swift (#3078)

* Metal support for Swift

* update

* add a toggle for arm/arm64

* set minimum versions for all platforms

* update to use newLibraryWithURL

* bump version

Co-authored-by: Jhen-Jie Hong <iainst0409@gmail.com>

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Co-authored-by: Jhen-Jie Hong <iainst0409@gmail.com>