Bump openssl from 0.10.55 to 0.10.64 (#7)

Bumps [openssl](https://github.com/sfackler/rust-openssl) from 0.10.55 to 0.10.64.
- [Release notes](https://github.com/sfackler/rust-openssl/releases)
- [Commits](sfackler/rust-openssl@openssl-v0.10.55...openssl-v0.10.64)

---
updated-dependencies:
- dependency-name: openssl
  dependency-type: indirect
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>