implement strict types

src/App/Http/Integrations/CoinApi/CoinApiConnector.php

...pp/Http/Integrations/CoinApi/Requests/GetQuoteRequest.php

src/App/Http/Integrations/Coinbase/CoinbaseConnector.php

...p/Http/Integrations/Coinbase/Requests/GetQuoteRequest.php

...ttp/Integrations/Coinmarketcap/CoinMarketCapConnector.php

...p/Integrations/Coinmarketcap/Requests/GetQuoteRequest.php

src/App/Services/AdaUsdQuoteService.php

src/App/process.php

src/config/app.php

src/config/services.php