chore(deps): bump proc-macro2 from 1.0.36 to 1.0.52

[dependabot]

Bumps proc-macro2 from 1.0.36 to 1.0.52.

Release notes

Sourced from proc-macro2's releases.

1.0.52

• Add Group::delim_span (#366)

1.0.51

• Implement rustc's limit on the number of # used for delimiting a raw string literal: 255 (#364)

1.0.50

• Implement Hash for proc_macro2::LineColumn (#362)

1.0.49

• Opt out of -Zrustdoc-scrape-examples on docs.rs for now

1.0.48

• Documentation improvements

1.0.47

• Fix integer overflow when nesting depth of nested comments exceeds 4 billion (#357)

1.0.46

• Make proc_macro2::TokenStream's FromStr impl consistent with proc_macro::TokenStream's on strings that begin with a byte order mark \u{feff} (#353)

1.0.45

• Fix panic on parsing disallowed raw identifiers such as r#self (#351)

1.0.44

• Expose span.before() and span.after() to access an empty Span located immediately before or after the input span (#348, upstream tracking issue: rust-lang/rust#87552)

1.0.43

• Add keywords to crates.io metadata

1.0.42

• Improve parsing performance in non-macro mode (#335)
• Expose a size_hint() for TokenStream's iterator (#334)

1.0.41

• Produce an accurate .size_hint() from TokenStream's iterator (#334)

1.0.40

• Stabilize Ident::new_raw constructor (#331, thanks @​mystor)

1.0.39

• Replace unicode-xid with unicode-ident crate: https://github.com/dtolnay/unicode-ident

1.0.38

• Reduce allocations done by Literal::byte_string constructor (#328)

1.0.37

• Rely on unicode-xid to optimize ASCII properly (#325)

Commits

• ab25487 Release 1.0.52
• 006d135 Merge pull request #367 from dtolnay/fallback
• 96da1a2 Rename 'stable' terminology to 'fallback'
• 65699c4 Merge pull request #366 from dtolnay-contrib/delim
• 0dc8736 Add DelimSpan to hold the 3 different spans of a delimiter
• 1e7fc7b Expand documentation of Group::delimiter
• 68bfd52 Format test cfg attributes with rustfmt
• 23d5478 Fix warning on duplicate test ignore attribute
• e1fa732 Account for proc_macro::Span layout change between 1.31 and 1.32
• 6083bef More specifically run make_sure_no_proc_macro test in CI
• Additional commits viewable in compare view

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