Bump syn from 1.0.91 to 1.0.93

[dependabot[bot]]

Bumps syn from 1.0.91 to 1.0.93.

Release notes

Sourced from syn's releases.

1.0.93

• Fix compile error when Some means something unusual in the expression namespace of the scope where custom_keyword is invoked (#1171, thanks @​zakarumych)

1.0.92

• Make compatible with Miri's tag-raw-pointers mode (#1166, thanks @​saethlin)

Commits

• 2e505a8 Release 1.0.93
• 16ef95e Merge pull request #1171 from zakarumych/fix-some
• 2775d48 Use Some from $crate
• 63f6c9f Run miri in stricter miri-strict-provenance mode
• ca511d1 Update test suite to nightly-2022-05-05
• fc09072 Update test suite to nightly-2022-05-02
• 9951445 Resolve type_repetition_in_bounds clippy lint
• 3c07913 Update test suite to nightly-2022-05-01
• a0cd03c Drop unneeded quoting from env variable in workflows yaml
• 069bdf5 Release 1.0.92
• Additional commits viewable in compare view

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[smoelius]

@dependabot squash and merge

[dependabot[bot]]

One of your CI runs failed on this pull request, so Dependabot won't merge it.

Dependabot will still automatically merge this pull request if you amend it and your tests pass.

[dependabot[bot]]

Superseded by #191.