Bump jekyll-feed from 0.11.0 to 0.12.0

Bumps jekyll-feed from 0.11.0 to 0.12.0.

Release notes

Sourced from jekyll-feed's releases.

v0.12.0

• Allow Jekyll v4 (still alpha)

Development Fixes

• style: fix offenses in specs (#248)
• dev: update CI and style settings (#258)
• Enable testing for Windows platform (#265)

Changelog

Sourced from jekyll-feed's changelog.

0.12.0 / 2019-03-21

• Allow Jekyll v4 (still alpha)

Development Fixes

• style: fix offenses in specs (#248)
• dev: update CI and style settings (#258)
• Enable testing for Windows platform (#265)

Commits

• 8f10fa0 Update history to reflect merge of #271 [ci skip]
• baa4646 Release: v0.12.0 (#271)
• 06ec061 Update history to reflect merge of #265 [ci skip]
• 1a3e417 Enable testing for Windows platform (#265)
• 4372697 Update history to reflect merge of #258 [ci skip]
• b8a3f83 dev: update CI and style settings (#258)
• 7ad572e chore(ci): test oldest and latest ruby versions only
• 3909f3b chore(deps): 🆙 jekyll-rubocop 0.4
• e97bc64 Update history to reflect merge of #248 [ci skip]
• b00b0bf style: fix offenses in specs (#248)
• Additional commits viewable in compare view