deps(deps): bump pglast from 7.7 to 7.8

[dependabot]

Bumps pglast from 7.7 to 7.8.

Changelog

Sourced from pglast's changelog.

7.8 (2025-10-19)

- Fix prettification of single keyword statements (`PR [#173](https://github.com/lelit/pglast/issues/173)`__), thanks to Vlastimil Zíma
__ lelit/pglast#173


Improve WithClause printer, when there is more than one CTE


Avoid spurious parenthesis around expression terms in some common cases like 1 + 2 + 3 + 4


Use macOS 14 to build arm 64 wheels and macOS 15 to build x86-64 wheels, given that GH is
going to drop macOS 13 runners__ in a couple of months
__ https://app.github.media/e/es?s=88570519&e=4325169&elq=c19630476abd40d0b7c6ff415b964f56


Generate Python 3.14 wheels, thanks to cibuildwheel 3.2.1__
__ https://cibuildwheel.pypa.io/en/stable/changelog/#v321

Commits

• 90a4f99 Release 7.8
• bb9c961 Update CHANGES.rst
• 813b4bb Use cibuildwheel 3.2.1
• ee8eddd Try with macos-15-intel runner
• c01c90f Use macOS 14 runners in GitHub Actions
• 45b7f4d Avoid spurious parens in simple expressions like 1+2+3+4
• 7f4777e Slightly better CTEs prettification
• 5410ba0 Handle removal of whole top level statements
• 6183add Cosmetic, un-split sample statement into a single line for readability
• c565762 Update CHANGES.rst
• Additional commits viewable in compare view

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