fix: encoding request response as null

This fixes an issue with gzipped content

src/extractor/generic/content/extract-clean-node.test.js

@@ -26,7 +26,7 @@ describe('extractCleanNode(article, $, { cleanConditionally })', () => {
     // console.log(result)
     // console.log(bestNode.html())
 
-    assert.equal($(bestNode).text().length, 3652)
+    assert.equal($(bestNode).text().length, 2687)
   })
 })
 

src/resource/utils/fetch-resource.js

@@ -23,6 +23,7 @@ export default async function fetchResource(url) {
     url: parsedUrl,
     headers: REQUEST_HEADERS,
     timeout: FETCH_TIMEOUT,
+    encoding: null,
   }
 
   const { response, body } = await get(options)

src/resource/utils/fetch-resource.test.js

@@ -13,7 +13,7 @@ describe('fetchResource(url)', () => {
     const url = 'http://theconcourse.deadspin.com/1786177057'
     const { body, response } = await fetchResource(url)
 
-    assert.equal(typeof body, 'string')
+    assert.equal(typeof body, 'object')
   })
 })