Bump css-what from 2.1.0 to 2.1.3

[dependabot[bot]]

Bumps css-what from 2.1.0 to 2.1.3.

Commits

• 2db00ca 2.1.3
• dc51092 fix(css-selectors): extend regex to include superscript in range, fix #27 (#28)
• a5f1991 Test on node LTS
• b2a2117 2.1.2
• e9ef3f1 Run prettier
• 070b2f8 Add remaining parsed outputs (#25)
• af801e4 update license references to match license file (#23)
• 2d495d0 Update to node 10 in .travis.yml (#22)
• c636f0d Allow escaped parentheses in pseudo selectors (#20)
• 4e255c9 Update .travis.yml
• Additional commits viewable in compare view

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