Install lsof with job using it

Author: blueyed

.github/workflows/main.yml

@@ -81,6 +81,7 @@ jobs:
             python: "3.7"
             os: ubuntu-latest
             tox_env: "py37-lsof-numpy-oldattrs-pexpect-twisted"
+            deps_run: sudo apt-get install lsof
           - name: "ubuntu-py37-pluggy"
             python: "3.7"
             os: ubuntu-latest
@@ -126,6 +127,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install tox coverage
+        ${{ matrix.deps_run }}
 
     - name: Test without coverage
       if: "matrix.skip_coverage"