Add getHeaders to context.response on the Plugin API

[monrax]

Is your feature request related to a problem? Please describe.
There is no way to get all response header keys

Describe the solution you'd like
Create a getHeaders method for context.response similar to the context.request one

Describe alternatives you've considered
None

Additional context
None

[develohpanda]

Thanks! Just adding notes for anybody looking to pick this up. 🙌🏽

Looks like context.request has a getHeaders method:

insomnia/packages/insomnia-app/app/plugins/context/request.js

Lines 73 to 78 in 28e7d92

	getHeaders(): Array<{ name: string, value: string }> {
	return renderedRequest.headers.map(h => ({
	name: h.name,
	value: h.value,
	}));
	},

But context.response is missing it:

insomnia/packages/insomnia-app/app/plugins/context/response.js

Lines 60 to 73 in 28e7d92

	getHeader(name: string): string | Array<string> | null {
	const headers = response.headers || [];
	const matchedHeaders = headers.filter(h => h.name.toLowerCase() === name.toLowerCase());
	if (matchedHeaders.length > 1) {
	return matchedHeaders.map(h => h.value);
	} else if (matchedHeaders.length === 1) {
	return matchedHeaders[0].value;
	} else {
	return null;
	}
	},
	hasHeader(name: string): boolean {
	return this.getHeader(name) !== null;
	},

Should be a fairly straightforward fix! I believe this is just an oversight. 🤗