Merge pull request #478 from crazy-max/virtual-envs

ci: update virtual envs

Author: crazy-max

.github/workflows/virtual-env.yml

@@ -15,7 +15,6 @@ jobs:
           - ubuntu-latest
           - ubuntu-20.04
           - ubuntu-18.04
-          - ubuntu-16.04
     steps:
       -
         name: List install packages