Regex 0.2.7 released --- includes rewrite of regex-syntax crate

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See the CHANGELOG entry here: https://github.com/rust-lang/regex/releases/tag/0.2.7

The most obvious user facing changes are:

  • Better error messages.
  • Better support for Unicode properties.
  • Set difference and symmetric difference operations are now available in character classes.
  • Support for Unicode is now exhaustively documented.

There are more details on the specifics of the regex-syntax rewrite here: https://github.com/rust-lang/regex/commit/715a8072890af65d2095d39f534b4b3dc4caeae2

Given the size of the change, it is not impossible that new bugs have been introduced. But the size of the test suite is just as big. :slight_smile: Nevertheless, be on the lookout for bugs and please report them!

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