add check for macOS

Author: dmitry-shibanov

.github/workflows/e2e-cache.yml

@@ -56,6 +56,9 @@ jobs:
           # } else {
           #   pipenv install flake8 --python ${{ matrix.python-version }}
           # }
+          if ($IsMacOS) {
+            $env:PATH += ":/Users/runner/.local/bin"
+          }
           pipenv install flake8
   python-pip-dependencies-caching-path:
     name: Test pip (Python ${{ matrix.python-version}}, ${{ matrix.os }})
@@ -101,4 +104,7 @@ jobs:
           # } else {
           #   pipenv install flake8 --python ${{ matrix.python-version }}
           # }
+          if ($IsMacOS) {
+            $env:PATH += ":/Users/runner/.local/bin"
+          }
           pipenv install flake8