…ichton

Update git2 requirement from 0.7.5 to 0.8.0

Updates the requirements on [git2](https://github.com/alexcrichton/git2-rs) to permit the latest version.
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- See full diff in [compare view](https://github.com/alexcrichton/git2-rs/commits/git2-curl-0.8.0)
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Update cargo, rls, miri

Update cargo, rls, miri

Added `rustc-workspace-hack` to miri so that it shares the same features for serde as other tools.

cc @alexcrichton

## cargo

25 commits in 2cf1f5dda2f7ed84e94c4d32f643e0f1f15352f0..0d1f1bbeabd5b43a7f3ecfa16540af8e76d5efb4
2018-12-11 03:44:04 +0000 to 2018-12-19 14:45:14 +0000
- Remove Stale bot's configuration (rust-lang/cargo#6463)
- Add labels to issue templates (rust-lang/cargo#6464)
- Fix new man page links. (rust-lang/cargo#6459)
- Fix metabuild compile errors with --message-format=json. (rust-lang/cargo#6432)
- Support alt-registry names in [patch] table. (rust-lang/cargo#6456)
- Update the rustup URL (rust-lang/cargo#6455)
- New man pages. (rust-lang/cargo#6405)
- Reify the DepFingerprint type (rust-lang/cargo#6451)
- Extract Fingerprint::new (rust-lang/cargo#6449)
- Upgrade the metabuild to Rust 2018 (rust-lang/cargo#6448)
- Make edition comparing code consistent (rust-lang/cargo#6450)
- Document `name` and `authors` in [package] (rust-lang/cargo#6447)
- Travis: only use mdbook 0.1.7. (rust-lang/cargo#6443)
- Update git2-curl requirement from 0.8.1 to 0.9.0 (rust-lang/cargo#6439)
- Update git2 requirement from 0.7.5 to 0.8.0 (rust-lang/cargo#6438)
- Display errors when `cargo fix` fails. (rust-lang/cargo#6419)
- cargo fix: fix targets with shared sources. (rust-lang/cargo#6434)
- Fix panic-in-panic in tests. (rust-lang/cargo#6431)
- More Rust 2018 edition cleanups (rust-lang/cargo#6422)
- Cleanup some trait impls for SourceId (rust-lang/cargo#6429)
- Remove a nightly check from doc tests (rust-lang/cargo#6427)
- Replace CargoError with failure::Error (rust-lang/cargo#6425)
- Allow testsuite warnings in dev (rust-lang/cargo#6426)
- add `--dry-run` option to cargo update (rust-lang/cargo#6371)
- Migrate to some Rust 2018 idioms (rust-lang/cargo#6416)

## rls

16 commits in bd5b899afb05e14d33e210ede3da241ca1ca088f..6f5e4bba7b1586fca6e0ea7724cadb5683b2f308
2018-12-10 08:53:00 +0100 to 2018-12-21 17:11:08 +0100
- Update jsonrpc-core (rust-lang/rls#1206)
- Use `home_dir` from `home` crate (rust-lang/rls#1207)
- Update cargo. (rust-lang/rls#1204)
- Fix deprecated `trim_{left,right}` warnings (rust-lang/rls#1203)
- Respect ${CARGO,RUSTUP}_HOME for tooltip relative dirs (rust-lang/rls#1201)
- Separate tooltip tests that require Racer fallback (rust-lang/rls#1200)
- tests: Don't generate tooltip results in tests/fixtures (rust-lang/rls#1199)
- Overhaul fixture handling in tests (rust-lang/rls#1190)
- Don't return symbols with empty names (rust-lang/rls#1193)
- Don't check AppVeyor CI status for bors
- Properly infer full_docs (rust-lang/rls#1192)
- Update cargo (rust-lang/rls#1191)
- Improve hover test_tooltip tests (rust-lang/rls#1175)
- Fix unused warnings (rust-lang/rls#1185)
- Workaround rust-lang/rls#703 to prevent obscure failures due to sccache. (rust-lang/rls#1177)
- Disable travis cache (rust-lang/rls#1182)

## miri

14 commits in bccadeb..6c2fc6d
2018-12-08 11:07:22 +0100 to 2018-12-26 14:28:25 +0100
- use memory::check_bounds_ptr for offset check (rust-lang/miri#589)
- Fix comparing function pointers (rust-lang/miri#587)
- fix for infallible allocation (rust-lang/miri#586)
- fix test for latest nightly (rust-lang/miri#585)
- Treat ref-to-raw cast like a reborrow: do a special kind of retag (rust-lang/miri#572)
- Test cargo-miri on Windows (rust-lang/miri#578)
- Cargo miri tweaks and test that we can exclude tests (rust-lang/miri#580)
- Fix cargo miri test (rust-lang/miri#550)
- fix for latest nightly (rust-lang/miri#574)
- Add rustc-workspace-hack. (rust-lang/miri#575)
- use RUSTC_WRAPPER for the cargo hook (rust-lang/miri#573)
- do not auto-detect the targets in the sysroot, instead specify target manually through env var (rust-lang/miri#570)
- Cleanup: Avoid repeating signatures, get rid of to_bytes hack (rust-lang/miri#568)
- Support building and running with full MIR on foreign architectures, drop support for missing MIR (rust-lang/miri#566)