Bump Node to 12 or later
na2hiro opened this issue · comments
Currently Node 10 is specified in .nvmrc, but its support has ended. https://nodejs.org/en/about/releases/
It should be 12 or later. Considering the support for 12 ends within 4 months, 14 or 16 should be better.
Area of changes: .nvmrc, .travis.yml and .github/workflows/gh-pages.yml