Queries with array parameters doesn't work

**Describe the bug**
Queries with query parameters that are array based doesn't work.

It boils down to this line:
https://github.com/IBM/openapi-to-graphql/blob/89515187ed664370a9bbc1cd58f843412d20741c/packages/openapi-to-graphql/src/resolver_builder.ts#L1374

An array is also considered an object in JavaScript. The if statement needs to be flipped.
