Pin test versions (#1373)

.github/workflows/pipeline.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Install dependencies
       run: |
         pip install --upgrade pip
-        pip install tox tox-gh-actions setuptools coveralls
+        pip install "tox<4" "tox-gh-actions<3" "setuptools<58" "coveralls<4"
     - name: Test with tox
       run: tox
     - name: Coveralls
@@ -33,7 +33,7 @@ jobs:
     needs: test
     runs-on: ubuntu-latest
     steps:
-    - name: Install coveralls
+    - name: Install "coveralls<4"
       run: pip install coveralls
     - name: Coveralls Finished
       run: coveralls --service github --finish

setup.py

@@ -26,22 +26,22 @@ install_requires = [
     'PyYAML>=5.1,<6',
     'requests>=2.9.1,<3',
     'inflection>=0.3.1,<0.6',
-    'openapi-spec-validator>=0.2.4,<2',
+    'openapi-spec-validator>=0.2.4,<0.4',
     'werkzeug>=1.0,<2.0',
 ]
 
-swagger_ui_require = 'swagger-ui-bundle>=0.0.2'
-flask_require = 'flask>=1.0.4'
+swagger_ui_require = 'swagger-ui-bundle>=0.0.2,<0.1'
+flask_require = 'flask>=1.0.4,<2'
 aiohttp_require = [
     'aiohttp>=2.3.10,<4',
     'aiohttp-jinja2>=0.14.0,<2'
 ]
 
 tests_require = [
-    'decorator',
-    'pytest',
-    'pytest-cov',
-    'testfixtures',
+    'decorator>=5,<6',
+    'pytest>=6,<7',
+    'pytest-cov>=2,<3',
+    'testfixtures>=6,<7',
     flask_require,
     swagger_ui_require
 ]