Bump scripts/makeself from 263bd2e to 7ed7219 (#165)

Bumps [scripts/makeself](https://github.com/megastep/makeself) from `263bd2e` to `7ed7219`.
- [Release notes](https://github.com/megastep/makeself/releases)
- [Commits](megastep/makeself@263bd2e...7ed7219)

---
updated-dependencies:
- dependency-name: scripts/makeself
  dependency-type: direct:production
...

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