Update simplelog requirement from 0.8.0 to 0.9.0

[dependabot]

Updates the requirements on simplelog to permit the latest version.

Changelog

Sourced from simplelog's changelog.

v0.9.0

- Add customizable level label colors (PR [#69](https://github.com/drakulix/simplelog.rs/issues/69). credits to @JarrettBillingsley)
- Remove unneeded TermLogError
- Future-proof config by adding `#[non_exhaustive]`
- Fix compiling with minimal-versions

v0.8.0

- Switch from `term` to `termcolor` (PR [#59](https://github.com/drakulix/simplelog.rs/issues/59). credits to @raybritton)
- Fix typo in docs (PR [#58](https://github.com/drakulix/simplelog.rs/issues/58), credits to @anthonyjmartinez)
- Switch default padding to `Off`. Padding is annoyingly controversal, just set it to whatever you prefer, if you want it.

v0.7.6

- Derive `Clone`,`Copy`,`PartialEq`,`Eq`,`Debug` and `Hash` for `TerminalMode`. (PR [#56](https://github.com/drakulix/simplelog.rs/issues/56), credits to @panhania)

v0.7.5

- Use `target()` instead of `module_path()` for filtering as suggested by `log`s docs. (PR [#52](https://github.com/drakulix/simplelog.rs/issues/52), credits to @tsidea)
- Allow logging thread names and pad thread ids (defaults match the old behaviour). (PR [#53](https://github.com/drakulix/simplelog.rs/issues/53), credits to @mulark)

v0.7.4

- Fixed time formats with 

v0.7.3

- Fixed `test` feature

v0.7.2

- Allow Level Padding to be configured

v0.7.1

- Fix `LevelFilter:Off` not turning off parts of the log messages

v0.7.0

- Add local time zone option
- Change config to builder pattern avoiding future major version bumps
- Add further documentation about dealing with `TermLogger` failing
- `term` 0.6.* is now also supported

v0.6.0

- Add time offset parameter (defaults to UTC)
- Add thread_id output (credits to @kurtlawrence)
- Pad log level
- Add TestLogger (credits to @AlexW-GH)
- Add stream configuration to TermLogger
- Implement allow- and ignore-filtering (credits to @ryankurte)

v0.5.3

- Fix minimal chrono version / update to chrono v0.4.1 (PR [#27](https://github.com/drakulix/simplelog.rs/issues/27), credits to @samueltardieu)

v0.5.2

- Don't interleave stdout and stderr (PR [#23](https://github.com/drakulix/simplelog.rs/issues/23), credits to @hansjorg)

... (truncated)

Commits

• 8338b80 v0.9.0
• 1a1a288 Add test for minimal-versions to travis
• 2f10cd1 Fix -Z minimal-versions
• 1c172f6 Future-proof config by requiring ..Default::default()
• d9b78ae Remove unneeded TermLogError
• bfb70b8 Merge pull request #69 from JarrettBillingsley/master
• 2e6e990 added ConfigBuilder::set_level_color to customize the colors of level label...
• 195361c Merge pull request #60 from rubenvandeven/master
• 0ab4176 Remove unwrap() on TermLogger::new() in README.
• See full diff in compare view

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[dependabot]

Superseded by #2.