Add support for `number[]` fields in configurations

[aiwilliams]

https://github.com/JupiterOne/sdk/blob/ddfe39c8242ce791501911ca018d76f95af993f2/packages/integration-sdk-runtime/src/execution/config.ts#L46

Add support for specifying that config fields are of type number[].

Related: https://github.com/JupiterOne/sdk/issues/433