Serialize APIGW queryStringParameters properly

[mrautio]

This has a dependency on a PR of query-map-rs: calavera/query-map-rs#11

API Gateway Lambda proxy payload's queryStringParameters is serialized incorrectly to format like "queryStringParameters":{"key":["value"]} when it should be like "queryStringParameters":{"key":"value"}
Reference: https://docs.aws.amazon.com/apigateway/latest/developerguide/http-api-develop-integrations-lambda.html

Description of changes:

• Corrected serialization of queryStringParameters for API Gateway Lambda proxy payload format version 1.0 and 2.0

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• I confirm that my contribution is made under the terms of the Apache 2.0 license.
• I confirm that I've made a best effort attempt to update all relevant documentation.

[calavera]

What's the V1 format when there are multiple parameters with the same name?

[mrautio]

What's the V1 format when there are multiple parameters with the same name?

Whoops, I misread the AWS doc. Now V1 value is correct. In V1 first value will be used if there are multiple values.

Example:
Source data: "key": ["value1", "value2"]
V1: "key": "value1"
V2: "key": "value1,value2"

[calavera]

This might be better directly in the QueryMap library, so it's transparent here: https://github.com/calavera/query-map-rs/tree/main/src/serde

[mrautio]

@calavera I've split the change to two PRs, query-map-rs PR here: calavera/query-map-rs#11

[calavera]

Thanks! I've just published the version 0.7.0 of query map. Feel free to update this PR with the changes to use that. I think you only need to bump the version in the Cargo.toml file, and everything should work.

[mrautio]

thank you for the quick release! I've now bumped the query_map version to 0.7 in this PR

[calavera]

awesome, thanks!