Syntax example in Readme uses "headers" instead of "header"

[rcavezza]

Took me a little bit of time to figure this out.

# This could go in an initializer
    FullContact.configure do |config|
        config.api_key = 'fullcontact_api_key_goes_here'
        config.auth_type = :headers # :header or :query
    end

Should be

# This could go in an initializer
    FullContact.configure do |config|
        config.api_key = 'fullcontact_api_key_goes_here'
        config.auth_type = :header # :header or :query
    end

[m272cels]

👍 , not sure how long it would have taken me to figure this out without looking at this issue.