Bump duct from 0.13.4 to 0.13.6

[dependabot[bot]]

Bumps duct from 0.13.4 to 0.13.6.

Commits

• 2db6ed6 version 0.13.6
• 523ab13 Add LICENSE to duct_sh crate
• 8baa85e Replace tempdir with tempfile, as the tempfile crate have superceded the temp...
• 8615ae7 use Vec<OsString> in macro to avoid unnecessary allocation
• 4f6b7a9 update shared_child to 1.0.0
• e409363 update os_pipe to 1.0.0
• bf26f62 Fix typos
• 8165fad version 0.13.5
• 83196c3 include unchecked in the doc examples
• 78fa8a7 add some crates.io keywords
• Additional commits viewable in compare view

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