Update dependency MarkupSafe to v1.1.1

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
MarkupSafe (changelog)	==1.0 → ==1.1.1

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Release Notes

pallets/markupsafe (MarkupSafe)

v1.1.1

Compare Source

Released 2019-02-23

• Fix segfault when __html__ method raises an exception when using
  the C speedups. The exception is now propagated correctly. :pr:109

v1.1.0

Compare Source

Released 2018-11-05

• Drop support for Python 2.6 and 3.3.
• Build wheels for Linux, Mac, and Windows, allowing systems without
  a compiler to take advantage of the C extension speedups. :pr:104
• Use newer CPython API on Python 3, resulting in a 1.5x speedup.
  :pr:64
• escape wraps __html__ result in Markup, consistent with
  documented behavior. :pr:69

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