Support compression (gzip)

[NateSkiles]

A customer requested that we add the ability to return compressed search results. Currently, we support this through CURL requests when setting the Accept-Encoding header to gzip.

curl -H "Accept-Encoding: gzip" -D - \
  "https://serpapi.com/search?api_key=YOUR_API_KEY&engine=google&q=Coffee&location=Austin,+Texas,+United+States&google_domain=google.com&gl=us&hl=en&no_cache=true" \
  -o output.json.gz

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