766: Bump indexmap from 1.1.0 to 1.2.0 r=Hywan a=dependabot-preview[bot]

Bumps [indexmap](https://github.com/bluss/indexmap) from 1.1.0 to 1.2.0.
<details>
<summary>Commits</summary>

- [`45dad09`](https://github.com/bluss/indexmap/commit/45dad09a97f7e9474dbfb8590defecf2e4d52a9e) 1.2.0
- [`0cfdf7d`](https://github.com/bluss/indexmap/commit/0cfdf7d2843ab6d59c5ec09f0a82f319c3b66650) MAINT: Fix cargo-release setting for tag name
- [`380e55c`](https://github.com/bluss/indexmap/commit/380e55c6a330b03f554f59ebd01c075bf396dd47) Merge pull request [#102](https://github-redirect.dependabot.com/bluss/indexmap/issues/102) from cuviper/lints
- [`042e1b4`](https://github.com/bluss/indexmap/commit/042e1b4a93e89985d01861d1036d22973a694d8e) Avoid scoped lints for Rust 1.30
- [`f799d95`](https://github.com/bluss/indexmap/commit/f799d9558e6f37e474cef364c8cc4079f9eb50fb) Allow clippy::eq_op in tests
- [`75850ce`](https://github.com/bluss/indexmap/commit/75850ce3595d1969f1a778988912d89ad333318c) Fix clippy::writeln_empty_string
- [`6b19c0e`](https://github.com/bluss/indexmap/commit/6b19c0e95d02e0292f225f52242f9e21b4c6d685) Fix clippy::transmute_ptr_to_ptr
- [`0206d91`](https://github.com/bluss/indexmap/commit/0206d91a33903b93b22bce9e9c131220d8a91a1f) Fix clippy::single_match
- [`abfffac`](https://github.com/bluss/indexmap/commit/abfffac4a786bde8494935b5904e6c44b2594a1b) Fix clippy::redundant_static_lifetimes
- [`d5acca7`](https://github.com/bluss/indexmap/commit/d5acca76beac05fb64868c88e175155a37dc2d5e) Fix clippy::redundant_pattern_matching
- Additional commits viewable in [compare view](https://github.com/bluss/indexmap/compare/1.1.0...1.2.0)
</details>
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[![Dependabot compatibility score](https://api.dependabot.com/badges/compatibility_score?dependency-name=indexmap&package-manager=cargo&previous-version=1.1.0&new-version=1.2.0)](https://dependabot.com/compatibility-score.html?dependency-name=indexmap&package-manager=cargo&previous-version=1.1.0&new-version=1.2.0)

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