18-asyncio/charfinder/http_charfinder.py 'Request' object has no Attribute 'GET'

the 18-asyncio-py3.7 folder doesn't have this file. 
but this file doesn't work in aiohttp3.5.4 with Python3.7.2
the Request object has no attribute 'GET', use query instead.
```
def home(request):
    try:
        query = request.GET.get('query', '').strip()
    except AttributeError:
        query = request.query.get('query', '').strip()
    print('Query: {!r}'.format(query))
```
