Bump smallvec from 0.4.5 to 1.4.2

[dependabot]

Bumps smallvec from 0.4.5 to 1.4.2.

Release notes

Sourced from smallvec's releases.

v1.4.2

• insert_many no longer leaks elements if the provided iterator panics (#213).
• The unstable const_generics and specialization features are updated to work with the most recent nightly Rust toolchain (#232).
• Internal code cleanup (#229, #231).

v1.4.1

• Don't allocate when the size of the element type is zero. Allocating zero bytes is undefined behavior. (#228)

v1.4.0

• Add try_reserve, try_reserve_exact, and try_grow methods (#214).

v1.3.0

• Add a new unstable const_generics feature (#204).
• Improve inlining of constructor functions (#206).
• Add a slice.to_smallvec() convenience method (#203).
• Documentation and testing improvements.

v1.2.0

• IntoIter now implements Debug (#196).
• smallvec! macro is now easier to use in no_std contexts where the vec! macro isn't automatically imported (#198).

v1.1.0

• Added new method SmallVec::into_boxed_slice (#190).
• Added new methods IntoIter::as_slice and as_mut_slice (#182).
• IntoIter now implements Clone (#192).
• Improved documentation and testing (#186, #189, #193).
• Minor code cleanups (#176).

v1.0.0

• Requires Rust 1.36 or later.
• [breaking change] Use MaybeUninit to avoid possible undefined behavior (#162, #170).
• [breaking change] The drain method now takes a range argument, just like the standard Vec::drain (#145).
• [breaking change] Remove the unreachable function and replace it with the new standard unreachable_unchecked function (#164).
• [breaking change] Use no_std by default. This crate depends only on core and alloc by default. If the optional write feature is enabled then it depends on std so that SmallVec<[u8;_]> can implement the std::io::Write trait (#173).
• [breaking change] Remove the deprecated VecLike trait (#165).
• Add support for 96-element small vectors, SmallVec<[T; 96]> (#163).
• Iterators now implement FusedIterator (#172).
• Indexing now uses the standard SliceIndex trait (#166).
• Add automatic fuzz testing and MIRI testing (#168, #162).
• Update syntax and formatting to Rust 2018 standard (#174, #167).

v0.6.14

• Fix a possible buffer overflow in insert_many (#252, #254).

v0.6.13

• Use the maybe-unit crate in place of soon-to-be-deprecated std::mem::uninitialized (#180). When built with Rust 1.36 or later, this fixes a source of undefined behavior. It also fixes deprecation warnings in Rust 1.39 and later, and test failures when run in MIRI. In Rust 1.35 and earlier it provides some safety improvements but does not completely eliminate undefined behavior. (However, we are not aware of any cases where the undefined behavior causes bugs in practice in those toolchains.)

v0.6.12

• Move code using default fn into its own module (#161).

... (truncated)

Commits

• 9ae7076 Auto merge of #233 - mbrubeck:bump, r=jdm
• ba0f462 Version 1.4.2
• 87500c3 Auto merge of #232 - c410-f3r:patch-1, r=mbrubeck
• 0e23d2a Use min_const_generics
• f7e01ef Auto merge of #230 - Atul9:add-cargo-fmt-to-travis-config, r=mbrubeck
• f7c7157 Auto merge of #231 - Atul9:cargo-fmt, r=mbrubeck
• 7f7ac30 Format code using 'cargo fmt'
• b3fada1 Add cargo fmt to travis build config
• cce91ca Auto merge of #213 - mbrubeck:leak, r=jdm
• 8ddf613 Fix leak on panic in insert_many.
• Additional commits viewable in compare view

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