Support automatic decompression of GZIP and DEFLATE by default

[tmenier]

Currently Flurl defaults to whatever HttpClient defaults to for this, but that's not consistent between platforms/versions. By most accounts, the decision not to enable these by default has to do solely with backward compatibility. For Flurl I think it makes sense to enable them by default.

[ongun23]

Throws exceptions on Ubuntu but works fine at Windows machine. Below code can be used for testing.

`string text = "https://www.hepsiburada.com/samsung-55tu7000-crystal-4k-ultra-hd-55-140-ekran-uydu-alicili-smart-led-tv-p-HBV00000UXPWF?magaza=Teknofish"
.WithHeader("Content-Encoding", "gzip")
.WithHeader("Content-Encoding", "deflate")
.WithHeader("authority", "www.hepsiburada.com")
.WithHeader("pragma", "no-cache")
.WithHeader("cache-control", "no-cache")
.WithHeader("sec-ch-ua", "" Not;A Brand";v="99", "Google Chrome";v="91", "Chromium";v="91"")
.WithHeader("sec-ch-ua-mobile", "?0")
.WithHeader("upgrade-insecure-requests", "1")
.WithHeader("user-agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36")
.WithHeader("accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3;q=0.9")
.WithHeader("service-worker-navigation-preload", "true")
.WithHeader("sec-fetch-site", "none")
.WithHeader("sec-fetch-mode", "navigate")
.WithHeader("sec-fetch-user", "?1")
.WithHeader("sec-fetch-dest", "document")
.WithHeader("accept-language", "tr-TR,tr;q=0.9,en-US;q=0.8,en;q=0.7,de;q=0.6,pl;q=0.5,ru;q=0.4,fr;q=0.3,pt;q=0.2,nl;q=0.1,it;q=0.1,mt;q=0.1,ka;q=0.1")
.WithHeader("cookie", "anon=A9F166E0D5B346CF67EB86A5E34228964A0059AD18D67DF5DB128BF7362CE86003DA863DBBF7317C230472E544E3A1165D71BFBAAEB2C9D94EA67B84A08B3C7B05E75BE747AD5286EEA4B981C6F250EF393D883ECA949958FFD000AD869F4D95E7B112D3C6E346177DD9D70DE32AAB109811A60909A71EF2F4B989E602E29799D43C861B67FE87F4950C52A98D90767F894419115BF2895A4392D82B23789F5A044AF7E3117FC8EA1B67905C2747498687094332EE76EAC9EB026A5394E3EA29A34A8498D1E66A6D3229A72E6943F11F3CD0D6AB734BFF47A7DC92F7DCE07E25B6935038A8D7A8E9402F3332121DF8CFF7E15E09A0457F928422D9038C53AE09658C54EC09C31351D30A4E7B6B8E3AC52774D992D136FA72CE41E0E5A034771392BC0F7E5BFAA0FF6EBFA22F7D976B50C0477ABC0560486CD106CE461AF750913A7DC293F047524E57680359; newhbv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e3ca79d7-5b26-4dd2-84d3-27e15e92c9d9; hbus_anonymousId=2d757022-6f4e-46a7-aa72-6bce1dc236f7; _hjid=f658d892-e236-405e-8796-5d95d0514496; ab.storage.deviceId.a19ee87d-6625-49ed-ad8c-f427b0067dec=%7B%22g%22%3A%227aa5210e-532c-3fef-4a61-e2c796025f1e%22%2C%22c%22%3A1612241196340%2C%22l%22%3A1612241196340%7D; ab.storage.userId.a19ee87d-6625-49ed-ad8c-f427b0067dec=%7B%22g%22%3A%222d757022-6f4e-46a7-aa72-6bce1dc236f7%22%2C%22c%22%3A1612241196351%2C%22l%22%3A1612241196351%7D; __zlcmid=12TjmdkcSH8b94K; searchHistory=[%22iphone%22%2C%22lcw%22%2C%22lc%20waikiki%20ti%C5%9F%C3%B6rt%22%2C%22samsung%22%2C%22ya%C4%9F%20koruyucu%22]; cookieconsentanon=true%7C5%2F5%2F2021%2C%209%3A04%3A30%20PM; _gaexp=GAX1.2.EvDcwtnLQwOxCA0ZjFwPlg.18847.x873; cto_bundle=uADIC19IczI4dGx5bkJOMHl1Q3lyZmFnWlMxNSUyRkRNJTJGaWpSOFR5ZThLJTJCRFJka2hXbjFSaktUY3JHVEd4czhXNm1CaVh4czU1cVNwJTJGZVREYUJyMGl6UkZPSCUyRjBjV2czdncySW81WWdDb1RQTXhTS2RhSkFYUGdHT0NHcEl2Vm9RakUlMkIyT3lPd0ZsUUM4OFBYWnZYNFhucXQ5ZUElM0QlM0Q; _gcl_au=1.1.342836334.1622560472; wt_fa=lv1624561421804|1655665421804#cv3|1655665421804#fv2021-05|1651341844218#vf47|1655665421804#; _gcl_aw=GCL.1625319011.CjwKCAjwlYCHBhAQEiwA4K21m0boTmHAiRfz8OUj92HG6h8vZbdEF4x7_tOWpE2xOTPM7LVexI5yWhoCEDoQAvD_BwE; _gcl_dc=GCL.1625319011.CjwKCAjwlYCHBhAQEiwA4K21m0boTmHAiRfz8OUj92HG6h8vZbdEF4x7_tOWpE2xOTPM7LVexI5yWhoCEDoQAvD_BwE; _gac_UA-834379-1=1.1625319013.CjwKCAjwlYCHBhAQEiwA4K21m0boTmHAiRfz8OUj92HG6h8vZbdEF4x7_tOWpE2xOTPM7LVexI5yWhoCEDoQAvD_BwE; HB_S_MR=1; _abck=C32801B056EB5BA990B49D1F75D167C30YAAQvoYUAq/B5Jx6AQAAhBn2nwZ7qOnruw87DxBzpgI5BWKn7QcRefmTdnmsiLUfgZ1TDPShN0L0vO7Fm10BsoNZPICGgij6lyf1Ms2AutfLnQ0ld81iH7elnxfxfeSQej0csJrGP54OvOARNqnu4sAV55Qx346kGLGnaPd7aErANjZRXWxMnZ9IVgTh/FB974XFP/TCvDEkRXp0p9/4BVRa/jIjXZv+hkGt7+kTYOyzqX3HxNk7qQaJgcxCLN6DK97wCT2sx2I+3LXYCZLpIlnLNd5BSwanWYJQaxnBY5E8Zzuq9eX5aEgqHpOxOqh6sw9r8zhKxyx2c6isG6sDJi13kRNwHzWjbeisGfRyn6xHlblc5p6hfcs7YgrD8nLuU7RrSo2zGPWbiIVQl7nZ7b/pgPiAUMOIt4+Q4og=-1-1~-1; bm_sz=1C15B765B51AA8385284F89C75ECE311YAAQvoYUArHB5Jx6AQAAhBn2nwyDD6olx/2d92R5SUcCYfVlHO+v+B67oiT7t4Dv8jxVa9jaDWzOtaC/fM3SZw+dp6CGNUj86snKG/AsScsV/4JxKlKdcM4497rf24onpw6Vut3byE8MQdzk0cFJ3qWO9RXX0nhgYurKuRjpYqgN1Ukd3uCqKWEfJILpUreSCzO5cX/Ie3k1jrZSEnmWzXc/0cG1aRKAaQ3faOCaqNUC5xRTRBRSTfXehMuxVJ0GqbJf/HKOuEHXyo5G3Q2nHFSH189CyVliomsLDDPqYe05dR5AJl8Rkw==44739223289666; useinternal=true; _gid=GA1.2.226740840.1626182067; wt3_sid=%3B289941511384204; ak_bmsc=103D0D3184F827289E9412323DB0AD12000000000000000000000000000000~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; _fbp=fb.1.1626182076607.851084044; __gads=ID=3670fdd4a7fbe150:T=1626182079:S=ALNI_MZhEdRjXzEoXrXzaglg4Jr-69PLeQ; _dgr_top_parent_category=; _hjTLDTest=1; _hjShownFeedbackMessage=true; isGlobalIp=0; AKA_A2=A; RT="z=1&dm=hepsiburada.com&si=b30uci2886f&ss=kr22tgen&sl=2&tt=0&obo=2"; dgr_pdp=5366517569636b526576696577737c517569636b436f6d6d656e747c4e6f6e65; _ga=GA1.1.1764921293.1607179430; wt3_eid=%3B289941511384204%7C2161224119500410277%232162618561800016176; ab.storage.sessionId.a19ee87d-6625-49ed-ad8c-f427b0067dec=%7B%22g%22%3A%229de2dacd-352f-c52e-e480-5fe977410305%22%2C%22e%22%3A1626187419105%2C%22c%22%3A1626185619106%2C%22l%22%3A1626185619106%7D; _ga_44CSPTX731=GS1.1.1626185613.146.0.1626186025.60; hbus_sessionId=5d413b61-9104-4f2b-bff1-e6ca6a6f6a1f%7C1626187877166; _hjIncludedInSessionSample=0; _hjAbsoluteSessionInProgress=0")
.GetStringAsync().Result;

        Console.WriteLine("test is " + text);

`