tests: tirando ubunto 18

Author: aime-n

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ['3.10']
-        os: [ubuntu-latest, ubuntu-18.04, macos-latest, windows-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
 
     steps:
       - uses: actions/checkout@v2