build(deps): bump regex-syntax from 0.6.10 to 0.6.11

[dependabot-preview]

Bumps regex-syntax from 0.6.10 to 0.6.11.

Changelog

Sourced from regex-syntax's changelog.

1.2.1 (2019-08-03)

This release does a bit of house cleaning. Namely:

• This repository is now using rustfmt.
• License headers have been removed from all files, in following suit with the
  Rust project.
• Teddy has been removed from the regex crate, and is now part of the
  aho-corasick crate.
  See aho-corasick's new packed sub-module for details.
• The utf8-ranges crate has been deprecated, with its functionality moving
  into the
  utf8 sub-module of regex-syntax.
• The ucd-util dependency has been dropped, in favor of implementing what
  little we need inside of regex-syntax itself.

In general, this is part of an ongoing (long term) effort to make optimizations
in the regex engine easier to reason about. The current code is too convoluted
and thus it is very easy to introduce new bugs. This simplification effort is
the primary motivation behind re-working the aho-corasick crate to not only
bundle algorithms like Teddy, but to also provide regex-like match semantics
automatically.

Moving forward, the plan is to join up with the bstr and regex-automata
crates, with the former providing more sophisticated substring search
algorithms (thereby deleting existing code in regex) and the latter providing
ahead-of-time compiled DFAs for cases where they are inexpensive to compute.

1.2.0 (2019-07-20)

This release updates regex's minimum supported Rust version to 1.28, which was
release almost 1 year ago. This release also updates regex's Unicode data
tables to 12.1.0.

1.1.9 (2019-07-06)

This release contains a bug fix that caused regex's tests to fail, due to a
dependency on an unreleased behavior in regex-syntax.

• [BUG #593](https://github-redirect.dependabot.com/rust-lang/regex/issues/593):
  Move an integration-style test on error messages into regex-syntax.

1.1.8 (2019-07-04)

This release contains a few small internal refactorings. One of which fixes
an instance of undefined behavior in a part of the SIMD code.

... (truncated)

Commits

• 169783c syntax: release 0.6.11
• b4c67cb syntax: drop ucd_util dependency
• caa075f syntax: absorb utf8-ranges crate
• 6b86983 literal: remove teddy
• fc3e6aa license: remove license headers from files
• 0e96af4 style: start using rustfmt
• See full diff in compare view

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[dependabot-preview]

Looks like regex-syntax is up-to-date now, so this is no longer needed.