refactor: expose gatsby-transformer-raml options

[davifantasia]

Closes #230

[vercel]

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[emmenko]

From a code perspective this looks fine to me, can't say too much about the logic though

[emmenko]

Suggested change

	options: { ...themeOptions.transformerRaml },
	options: themeOptions.transformerRaml,

[emmenko]

Suggested change

	One of the benefits of the gatsby-transformer-raml tool is that it supports multiple api specs parsing. For this to work properly, we recommend setting up the the specs root directory such that all the specs directory are flattened. See example below:
	One of the benefits of the gatsby-transformer-raml tool is that it supports multiple api specs parsing. For this to work properly, we recommend setting up the specs root directory such that all the specs directory are flattened. See example below:

[emmenko]

Suggested change

	{ includeApis = [], movePropertiesToTop = [], movePropertiesToBottom = [] }
	{ includeApis = [], movePropertiesToTop = [], movePropertiesToBottom = [] } = {}