Update to latest mynewt-artifact (0.0.15)

This pulls in a fix for verifying images with header padding.
2 files changed
tree: 6a14967c5d9655402e0bd0481d522e502cf2d21d
  1. cli/
  2. iimg/
  3. ikey/
  4. imfg/
  5. iutil/
  6. .gitignore
  7. go.mod
  8. go.sum
  9. imgmod.go