Bump proc-macro2 from 1.0.51 to 1.0.52

[dependabot[bot]]

Bumps proc-macro2 from 1.0.51 to 1.0.52.

Release notes

Sourced from proc-macro2's releases.

1.0.52

• Add Group::delim_span (#366)

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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[codecov-commenter]

Codecov Report

Merging #173 (f3c9620) into master (3d3f740) will not change coverage. The diff coverage is n/a.

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@@           Coverage Diff           @@
##           master     #173   +/-   ##
=======================================
  Coverage   91.89%   91.89%           
=======================================
  Files          14       14           
  Lines        1160     1160           
=======================================
  Hits         1066     1066           
  Misses         94       94           

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[dependabot[bot]]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.