Update to `scale-info 1.0` and support new metadata versioning

Sergej Kostjucenko requested to merge aj-scale-info-1.0.0 into master

Created by: ascjones

Rel https://github.com/paritytech/ink/pull/845

Edit: Requires a new release of ink! rc6 including the 1.0 dependency via https://github.com/paritytech/ink/pull/845

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