Bump smallvec from 1.1.0 to 1.6.1

[dependabot[bot]]

Bumps smallvec from 1.1.0 to 1.6.1.

Release notes

Sourced from smallvec's releases.

v1.6.1

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

v1.6.0

• The "union" feature is now compatible with stable Rust 1.49 (#248, #247).
• Fixed warnings when compiling with Rust 1.51 nightly (#242, #246).

v1.5.1

• Improve performance of push (#241).

v1.5.0

• Add the append method (#237).
• Add support for more array sizes between 17 and 31 (#234).
• Don't panic on deserialization errors (#238).

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).

Commits

• 4e53e07 Auto merge of #254 - mbrubeck:overflow, r=emilio
• 9998ba0 Fix potential buffer overflow in insert_many
• 0b2b4e5 Auto merge of #249 - mbrubeck:bump, r=jdm
• 7ec5548 Version 1.6.0
• 73a8953 Auto merge of #248 - saethlin:master, r=mbrubeck
• 2785548 make union feature work on 1.50
• f5f1a22 Auto merge of #246 - mbrubeck:warnings, r=jdm
• d00f4d4 Silence warnings about deprecated LayoutErr
• e4c73e4 Auto merge of #242 - c410-f3r:patch-2, r=mbrubeck
• c1e68df Auto merge of #244 - mbrubeck:bump, r=jdm
• Additional commits viewable in compare view

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