Bump bindgen from 0.51.1 to 0.53.1

[dependabot]

Bumps bindgen from 0.51.1 to 0.53.1.

Changelog

Sourced from bindgen's changelog.

0.53.1

Released 2020/02/03.

Added

• Opt-in to convert size_t to usize again (#1720).

---

0.53.0

Released 2020/02/02.

Added

• Support for wasm_import_module. (#1691).
• non_exhaustive feature is now stable (#1698).
• Various objective-C improvements (#1702).

Changed

• Removed size_t to usize conversion rule (#1688).

Fixed

• Various unneeded padding fields shouldn't be generated anymore (#1710).
• Bitfields on packed structs should generate correct layout (#1717).
• Too large bitfield blocks now generate compiling code (#1719).

---

0.52.0

Released 2019/11/19.

Added

• Added newtype enum style, much like bitfield but without the bitwise ops (#1677).
• Added support for MaybeUninit rather than mem::uninitialized() (#1666).
• Allowed static linking (#1620) behind a feature. Note that if you're using default-features = false, you probably want to use the "runtime" feature to get the same behavior as before.

Changed

• Use c_void from core when --use-core is specified and available (#1634).
• Various dependencies and features are non-default now (like regex unicode features).

... (truncated)

Commits

• 02e76fa Release 0.53.1.
• f96dcf9 options: Add an opt-in to recover the size_t behavior removed in 5d38f2ac.
• 1d86a83 Release v0.53.0
• e951825 ir: codegen: Handle too large bitfield units.
• 2929af6 ir: Deindent some code trivially.
• 0153dfe ir: Account for packedness when computing bitfield sizes.
• e0a0400 Add comments about regex usage in {white|black}list functions
• 6ff3efd Add ,ignore to avoid that CI compiles these examples.
• 96d8961 Add how to deal with bindgen padding fields.
• 7941b91 codegen: Max guaranteed alignment is 8 (with u64), not target pointer width.
• Additional commits viewable in compare view

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[dependabot]

Looks like bindgen is no longer updatable, so this is no longer needed.