GitHub Pages - Package Updates

[nebulon]

[1.14.7]

• Update GitHub Pages to 217

[nebulon]

[1.14.8]

• Update GitHub Pages to 2.18
• Roll back remote themes for gem-based themes #781

[girish]

[1.14.9]

• Update GitHub Pages to 219

[girish]

[1.15.0]

• Update GitHub Pages to 220

[nebulon]

[1.15.1]

• Update GitHub Pages to 221

[nebulon]

[1.15.2]

• Update GitHub Pages to 222

[nebulon]

[1.15.3]

• Update GitHub Pages to 223
• Update base image to 3.2.0

[nebulon]

[1.15.4]

• Update GitHub Pages to 225
• Full changelog
• Update automation by @felipesu19 in https://github.com/github/pages-gem/pull/812
• Update tag/release script by @felipesu19 in https://github.com/github/pages-gem/pull/814
• Bump jekyll-commonmark-ghpages by @yoannchaudet in https://github.com/github/pages-gem/pull/820
• Bump jekyll-seo-tag to v2.8.0 by @hubot in https://github.com/github/pages-gem/pull/817
• Pass the UNSAFE option to commonmark by @yoannchaudet in https://github.com/github/pages-gem/pull/821

[nebulon]

[1.15.5]

• Update GitHub Pages to 226
• Full changelog

[nebulon]

[1.15.6]

• Update GitHub Pages to 227
• Full changelog

[girish]

[1.16.0]

• Update base image to 4.0.0

[girish]

[1.17.0]

• Update GitHub Pages to 228
• Full changelog

[girish]

[1.18.0]

• Make build branch configurable
• Check for .nojekyll at root of repo to skip Jekyll build