fix(types): Log types

[chloelbn]

Related issue: #1137

This fixes the types of Log, as well as putting some field optionals

[nunomaduro]

Still not quite there looking at the tests:

    Expected: ArrayContaining ["timestamp", "method", "answer_code", "query_body", "answer", "url", "ip", "sha1", "query_headers", "nb_api_calls", "processing_time_ms"]
    Received: ["timestamp", "method", "answer_code", "query_body", "answer", "url", "ip", "query_headers", "sha1", "processing_time_ms", "index", "query_params"]

[nunomaduro]

The bundledize is failing, but we didn't touch on the source code. I will try to check this.

[Haroenv]

bundlesize change is indeed unexpected, type change looks good!

[Haroenv]

bundlesize is failing since af659f1, so not blocking this fix, however it's probably blocking release