Parse data from fixer.io.

def fixer(base, target):
    """Parse data from fixer.io."""
    api_url = 'http://api.fixer.io/latest'
    resp = requests.get(
        api_url,
        params={
            'base': base,
            'symbols': target,
        },
        timeout=1,
    )
    data = resp.json()
    return decimal.Decimal(data['rates'][target])