[workflows/ci.yml] Change ubuntu-latest to ubuntu-18.04
authorSergey M․ <dstftw@gmail.com>
Sun, 10 Jan 2021 18:30:54 +0000 (01:30 +0700)
committerSergey M․ <dstftw@gmail.com>
Sun, 10 Jan 2021 18:30:54 +0000 (01:30 +0700)
commitd0fc289f45763ab556936c2ce3d76fc1c3dd7c69
tree86e45c1b6d9e7eb32ef98010dbfb467aba030f18
parent70f572585df5740da90feb518a93f10bb479cca2
[workflows/ci.yml] Change ubuntu-latest to ubuntu-18.04

ubuntu-latest alias will be switched to ubuntu-20.04 soon (see [1]) which lacks python 3.3 and 3.4 (see [2]).

1. https://github.blog/changelog/2020-10-29-github-actions-ubuntu-latest-workflows-will-use-ubuntu-20-04/
2. https://raw.githubusercontent.com/actions/python-versions/main/versions-manifest.json
.github/workflows/ci.yml