Jekyll 4.1.0 breaks Travis tests #394
Description
Using Jekyll version 4.1.0 (which was released the other day) breaks Travis tests. The .travis.yml file should lockdown Jekyll to ~> 4.0.0 or fix the tests: https://github.com/jekyll/jekyll-seo-tag/blob/master/.travis.yml#L18.
Long story short, I was fiddling around with a fork, and found that the later version breaks: https://travis-ci.com/github/emma-sax4/jekyll-seo-tag/builds/168817663. But locking down Travis succeeds again: https://travis-ci.com/github/emma-sax4/jekyll-seo-tag/builds/168820682.