[typescript-axios] Support array query arguments

[dantman]

typescript-axios does not correctly output query arguments when you use explode: true for a parameter.

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fixes #7966
fixes #7973

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[TiFu]

Merged - Thank you for your pull request (and patience ;))!

[wing328]

@dantman thanks for the PR, which has been included in the v5.1.0 release: https://twitter.com/oas_generator/status/1373636654024380423