fix: windows pip installation of dependencies in gh actions

Author: nikhilym

scripts/ci/sdk_install

@@ -22,13 +22,13 @@ sdk_packages = [
 if sys.version_info.major == 3:
     sdk_packages.extend(["django-ask-sdk", "ask-sdk-local-debug"])
 
-run("pip install coverage")
+run("python -m pip install coverage")
 
 for pkg in sdk_packages:
     os.chdir(os.path.join(REPO_ROOT, pkg))
-    run("pip install -r requirements.txt")
+    run("python -m pip install -r requirements.txt")
     if os.path.isdir('dist') and os.listdir('dist'):
         shutil.rmtree('dist')
     run('python setup.py bdist_wheel')
     wheel_dist = os.listdir('dist')[0]
-    run('pip install %s' % (os.path.join('dist', wheel_dist)))
+    run('python -m pip install %s' % (os.path.join('dist', wheel_dist)))

tox.ini

@@ -26,8 +26,8 @@ setenv =
     AWS_DEFAULT_REGION = us-west-2
 commands =
     flake8 .
-    pip install --upgrade pip
-    pip install --upgrade wheel
+    python -m pip install --upgrade pip
+    python -m pip install --upgrade wheel
     {toxinidir}/scripts/ci/sdk_install
     {toxinidir}/scripts/ci/run_tests
     py{36,37,38}: mypy ask-sdk/ask_sdk
@@ -53,8 +53,8 @@ setenv =
     AWS_DEFAULT_REGION = us-west-2
 commands =
     flake8 .
-    pip install --upgrade pip
-    pip install --upgrade wheel
+    python -m pip install --upgrade pip
+    python -m pip install --upgrade wheel
     python {toxinidir}\scripts\ci\sdk_install
     python {toxinidir}\scripts\ci\run_tests
     mypy ask-sdk\ask_sdk