Bump anstream from 0.6.5 to 0.6.18

[dependabot[bot]]

Bumps anstream from 0.6.5 to 0.6.18.

Commits

• fabe0c3 chore: Release
• 762ca76 docs: Update changelog
• d364ac4 Merge pull request #229 from epage/cfg
• ad3f458 fix(stream): Respect 'test' feature
• 0b8d105 fix(stream): Refer to correct stream on panic
• 69cf6c9 refactor(stream): Pull out test macro body
• c78b3c1 refactor(stream): Be extra clear that macros mod is not for use
• ab37812 chore(deps): Update compatible (dev) (#226)
• 7c48196 Merge pull request #227 from rust-cli/renovate/stable-1.x
• a28405f style: Make clippy happy
• Additional commits viewable in compare view

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