Fix for issue #6 - Handle Bearer tokens correctly

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A fix for issue #6 to handle Bearer token authentication correctly

 » ./sj prepare -l api.json -T https://test.local

INFO[0000] Gathering API details.
                      
INFO[0000] Available authentication mechanisms:         
    - bearer
INFO[0000] A bearer token is accepted. Would you like to provide one? (y/N) 
y
What value would you like to use for the Bearer Token?ABCDEF

Title: API.
curl -sk -X GET 'https://test.local/api?type=test' -H 'Authorization: Bearer ABCDEF'
curl -sk -X POST 'https://test.local/api/settings' -H 'Authorization: Bearer ABCDEF'

[twest-bf]

Looks good, updated the version string. Merging.