Merge #167

167: Bump sloggers from 0.3.4 to 0.3.5 r=pitkley a=dependabot-preview[bot]

Bumps [sloggers](https://github.com/sile/sloggers) from 0.3.4 to 0.3.5.
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<summary>Commits</summary>

- [`de6d020`](sile/sloggers@de6d020) Bump version to v0.3.5
- [`959d345`](sile/sloggers@959d345) Remove unnecessary `extern crate` in examples.
- [`3ebdf56`](sile/sloggers@3ebdf56) Remove unnecessary `fn main` from examples.
- [`1477335`](sile/sloggers@1477335) Merge pull request [#25](https://github-redirect.dependabot.com/sile/sloggers/issues/25) from koba-e964/tmp/make-libflate-optional
- [`15c18c5`](sile/sloggers@15c18c5) Make libflate optional
- See full diff in [compare view](sile/sloggers@0.3.4...0.3.5)
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[![Dependabot compatibility score](https://api.dependabot.com/badges/compatibility_score?dependency-name=sloggers&package-manager=cargo&previous-version=0.3.4&new-version=0.3.5)](https://dependabot.com/compatibility-score.html?dependency-name=sloggers&package-manager=cargo&previous-version=0.3.4&new-version=0.3.5)

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