port tootsuite#12831 to monsterfork: Fix Ruby 2.7 support

- update http gem to avoid errors
- update blurhash gem to avoid shared object loading error
- update goldfinger gem so the http gem could be updated
- update json gem to avoid warnings

app/lib/request.rb

@@ -79,7 +79,7 @@ def valid_url?(url)
       %w(http https).include?(parsed_url.scheme) && parsed_url.host.present?
     end
     def http_client
-      HTTP.use(:auto_inflate).timeout(:per_operation, TIMEOUT.dup).follow(max_hops: 2)
+      HTTP.use(:auto_inflate).timeout(TIMEOUT.dup).follow(max_hops: 2)
     end
   end