Bugfix/stringlistvalue

[setoelkahfi]

Probably related: #81

The string_list_values and binary_list_values are not required in the MessageAttributes object of the SQS payload. Doc.

We encountered a bug where the lambda throws an error with a message attributes like this:

{
    "action": {
        "DataType": "String",
        "StringValue": "CREATE"
    }
}

CHANGES

• Add #[serde(default)] for non-required vectors.

[lbeschastny]

While serde(default) fixes the issue here, it also makes the absence of a value here undistinguishable from an empty array.
So, perhaps Option<Vec<String>> would be a better choice here.

But we should also keep in mind that those two fields are not actually used for anything yet and just reserved for future use (see AWS docs here).
So, it’s hard to tell now whether this limitation may cause any problems in the future or not.

[calavera]

I'm ok with these changes. I don't think the difference between "absence" vs "empty" will be really meaningful in thsi case.

[setoelkahfi]

@calavera can we make a release patch for this?

[calavera]

@setoelkahfi I just released 0.8.4 with this patch.

[setoelkahfi]

@calavera thanks!