Update dependency date-fns to ^2.15.0

Created by: renovate[bot]

This PR contains the following updates:

Package	Type	Update	New value	References	Sourcegraph
date-fns	dependencies	minor	^2.15.0	source

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Release Notes

date-fns/date-fns

v2.15.0

Compare Source

Thanks to @​belgamo, @​Matsuuu, @​Imballinst, @​arsnyder16, @​pankajupadhyay29, @​DCBN, @​leedriscoll, @​gottsohn, @​mukuljainx and @​dtriana for working on the release. Also kudos to @​KidkArolis, @​imgx64, @​fjc0k, @​wmonk, @​djD-REK, @​dandv, @​psimk and @​brimworks for improving the documentation.

Fixed

• Fixed behavior of addBusinessDays when input date is a weekend day.
• Fixed parseISO not returning Invalid Date on incorrect string when there are spaces in it.
• Fixed es round-tripping dates with Wednesday.
• Fixed round-trip bug with d/EEEE ordering in tokens like PPPPP.
• Fixed issues with parsing values in Japanese.
• Fixed Hungarian breaking IE11.
• Fixed Spanish accents in Saturday and Wednesday.

Changed

• Improved the message of protected tokens error.

Added

• Added Swiss-French fr-CH locale.
• Added Flemish nl-BE locale.
• Added Scottish Gaelic gd locale.
• Added New Zealand English en-NZ locale.
• Added isMatch function.

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