Bump pest from 2.5.3 to 2.6.0

[dependabot[bot]]

Bumps pest from 2.5.3 to 2.6.0.

Commits

• 6355eae fuzz: decrease the call limit in the json fuzzer (#841)
• 20f0842 Implement ExactSizeIterator for Pair iterators (#833)
• 5a05e69 Fix #838 grammar error when only have //!, /// or //. (#839)
• 76963f5 Add basic support for node_tag, iterator, and meta grammar (#832)
• f668fcc doc: add a link to awesome-pest (#828)
• 9e96a75 Update syn to v2 (#826)
• b98805c Fixup lifetimes of PrattParser (#824)
• f294ead doc: added a note regarding the no_std support (#819)
• ebb1ccd fix: grammar //// parsing error. (fixes #817) (#818)
• 18ca64f Update benchmark result typo (with Pest v2.5.2 as base line). (#794)
• Additional commits viewable in compare view

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