security: Fix zip-slip vulnerability

[otavio]

It uses relative destination paths to unpack files in unexpected places.

More details can be found at: http://snyk.io/research/zip-slip-vulnerability

Fixes: #63
Signed-off-by: Otavio Salvador otavio@ossystems.com.br

[coveralls]

Pull Request Test Coverage Report for Build 1085180927

• 8 of 8 (100.0%) changed or added relevant lines in 1 file are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.5%) to 86.877%

---

Files with Coverage Reduction	New Missed Lines	%
../../../../../usr/share/rust/.cargo/registry/src/github.com-1ecc6299db9ec823/futures-channel-0.3.16/src/mpsc/queue.rs	2	94.59%

Totals
Change from base Build 1083410651:	0.5%
Covered Lines:	331
Relevant Lines:	381

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 1085180927

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 8 of 8 (100.0%) changed or added relevant lines in 1 file are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.6%) to 86.877%

---

Files with Coverage Reduction	New Missed Lines	%
../../../../../usr/share/rust/.cargo/registry/src/github.com-1ecc6299db9ec823/futures-channel-0.3.16/src/mpsc/queue.rs	2	94.59%

Totals
Change from base Build 1083410651:	0.6%
Covered Lines:	331
Relevant Lines:	381

---

💛 - Coveralls