Commits on May 13, 2021

1. Add lower bound for aiohttp-cors + fix primer …

   It appears sqlalchemy has recently reformatted their project with
   Black 21.5b1.
   
   Most of our dependencies have a lower bound and creating a test
   environment with the oldest acceptable dependencies runs the full
   Black test suite just fine. The only exception to this is aiohttp-cors.
   It's unbounded and the oldest version 0.1.0 until 0.4.0 breaks the
   test suite in such an old environment.
   
   Failure with 0.1.0:
   
   ```
   tests/test_blackd.py:10: in <module>
       import blackd
   testenv/lib/python3.8/site-packages/blackd/__init__.py:12: in <module>
       import aiohttp_cors
   testenv/lib/python3.8/site-packages/aiohttp_cors/__init__.py:29: in <module>
       from .urldispatcher_router_adapter import UrlDistatcherRouterAdapter
   testenv/lib/python3.8/site-packages/aiohttp_cors/urldispatcher_router_adapter.py:27: in <module>
       class UrlDistatcherRouterAdapter(RouterAdapter):
   testenv/lib/python3.8/site-packages/aiohttp_cors/urldispatcher_router_adapter.py:32: in UrlDistatcherRouterAdapter
       def route_methods(self, route: web.Route):
   E   AttributeError: module 'aiohttp.web' has no attribute 'Route'
   ```
   
   For 0.2.0:
   
   ```
   tests/test_blackd.py:10: in <module>
       import blackd
   testenv/lib/python3.8/site-packages/blackd/__init__.py:12: in <module>
       import aiohttp_cors
   testenv/lib/python3.8/site-packages/aiohttp_cors/__init__.py:27: in <module>
       from .cors_config import CorsConfig
   testenv/lib/python3.8/site-packages/aiohttp_cors/cors_config.py:24: in <module>
       from .urldispatcher_router_adapter import UrlDistatcherRouterAdapter
   testenv/lib/python3.8/site-packages/aiohttp_cors/urldispatcher_router_adapter.py:27: in <module>
       class UrlDistatcherRouterAdapter(AbstractRouterAdapter):
   testenv/lib/python3.8/site-packages/aiohttp_cors/urldispatcher_router_adapter.py:32: in UrlDistatcherRouterAdapter
       def route_methods(self, route: web.Route):
   E   AttributeError: module 'aiohttp.web' has no attribute 'Route'
   ```
   
   For 0.3.0:
   
   ```
   ERROR: Cannot install aiohttp-cors==0.3.0 and aiohttp==3.6.0 because these package versions have conflicting dependencies.
   
   The conflict is caused by:
       The user requested aiohttp==3.6.0
       aiohttp-cors 0.3.0 depends on aiohttp<=0.20.2 and >=0.18.0
   
   To fix this you could try to:
   1. loosen the range of package versions you've specified
   2. remove package versions to allow pip attempt to solve the dependency conflict
   
   ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/user_guide/#fixing-conflicting-dependencies
   ```

   

   ichard26 committed May 13, 2021
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   b3c6f06 View commit details

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