Update sybil to 1.3.0

[pyup-bot]

This PR updates sybil from 1.2.2 to 1.3.0.

Changelog

1.3.0

-------------------

- Treat all documentation source files as being ``utf-8`` encoded. This can be overriden
by passing an encoding when instantiating a :class:`~sybil.Sybil`.

Links

• PyPI: https://pypi.org/project/sybil
• Changelog: https://pyup.io/changelogs/sybil/
• Repo: https://github.com/cjw296/sybil

[codecov]

Codecov Report

Merging #130 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #130   +/-   ##
=======================================
  Coverage   26.07%   26.07%           
=======================================
  Files          15       15           
  Lines        4430     4430           
=======================================
  Hits         1155     1155           
  Misses       3275     3275           

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[YourLocalBlake]

bors try

[bors]

try

Build succeeded:

• codecov/project
• codecov/patch
• continuous-integration/travis-ci/push

[YourLocalBlake]

circleci will fail because of synphot not being able to be built from wheels.

[YourLocalBlake]

bors r+

[bors]

Build succeeded:

• codecov/patch
• codecov/project
• continuous-integration/travis-ci/push