v0.1.4

Fixed

Added

• New input product_version_meta for adding a metadata field to the product version.
• New input work_dir for setting the working directory.
• New CLI allows running local build and verification just like in CI.

Changed

• The product_version input is now optional. Instead we should use a VERSION file
  in either the repo root, or .release/ or dev/.
• The product_name input's default is now the working directory name, unless
  the working directory is the repository root, in which case it still defaults
  to the repository name.

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Internal Changes

• Add make version/set VERSION=<X.Y.Z> to set the development version.
• Changelog generation more robust.
• When pre-push hook fails you now see the output so it's easier to debug.
• Readme tidied up.
• Converted digest inputs to Go.
• Converted build functionality to Go.
• Converted remaining functionality to Go.