Use httpx with gql-cli if aiohttp is not available on auto transport

[leszekhanusz]

Using the httpx transport by default with gql-cli if aiohttp is not available if no transport is specified.

Related: #527

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (57ef910) to head (47b15ef).
Report is 22 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #528   +/-   ##
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  Coverage   100.00%   100.00%           
=========================================
  Files           30        30           
  Lines         3102      3139   +37     
=========================================
+ Hits          3102      3139   +37     

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[traylenator]

echo 'query { continent(code:"AF") { name } }' | gql-cli https://countries.trevorblades.com
Error: 

No suitable dependencies has been found for an http(s) backend (aiohttp or httpx).

Please check the install documentation at:
https://gql.readthedocs.io/en/stable/intro.html#installation

Thanks.

[leszekhanusz]

@traylenator What is the problem? Did you check the installation instructions?

[traylenator]

@traylenator What is the problem? Did you check the installation instructions?

Nothing is wrong - was just saying thanks . All good.