Bump flarefoundation/litecoin from 0.21.3 to 0.21.4 (#27)

Bumps flarefoundation/litecoin from 0.21.3 to 0.21.4.

---
updated-dependencies:
- dependency-name: flarefoundation/litecoin
  dependency-version: 0.21.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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