- Update appveyor to Visual Studio 2019 and update target frameworks

- Update README.md: Cloudflare is obsolete

Author: grandsilence

README.md

@@ -41,7 +41,12 @@ Install-Package Leaf.xNet
 - PUT
 - OPTIONS
 
-### CloudFlare bypass
+### Cloudflare bypass (obsolete)
+
+> Not maintained in public Leaf.xNet anymore.  
+  But you can [order private paid Leaf.xNet with support](https://t.me/kelog).  
+  Telegram: [@kelog](https://t.me/kelog)
+    
 See demo project in the Examples folder.
 
 ```csharp
@@ -57,7 +62,7 @@ var resp = httpRequest.Get("https://...");
 bool isCloudFlared = resp.isCloudFlared();
 ```
 
-### CloudFlare bypass when ReCaptcha required
+#### CloudFlare bypass when ReCaptcha required
 See demo project in the Examples folder.
 ```csharp
 using Leaf.xNet.Services.Captcha;

appveyor.yml

@@ -1,9 +1,9 @@
-version: 5.1.{build}
+version: 5.2.{build}
 branches:
   only:
   - master
 skip_tags: true
-image: Visual Studio 2017
+image: Visual Studio 2019
 configuration: Release
 dotnet_csproj:
   patch: true
@@ -29,19 +29,15 @@ build:
   verbosity: minimal
 artifacts:
 - path: Leaf.xNet\bin\Release\net452
-  name: net452
+  name: Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.5.2
 - path: Leaf.xNet\bin\Release\net462
-  name: net462
-- path: Leaf.xNet\bin\Release\net471
-  name: net471
+  name: Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.6.2
 - path: Leaf.xNet\bin\Release\net472
-  name: net472
-- path: Leaf.xNet\bin\Release\netcoreapp2.0
-  name: netcoreapp2.0
-- path: Leaf.xNet\bin\Release\netcoreapp2.1
-  name: netcoreapp2.1
-- path: Leaf.xNet\bin\Release\netcoreapp2.2
-  name: netcoreapp2.2
+  name: Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.7.2
+- path: Leaf.xNet\bin\Release\net48
+  name: Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.8
+- path: Leaf.xNet\bin\Release\netstandard2.0
+  name: Leaf.xNet_v$(appveyor_build_version)__NET_Standard_2.0
 deploy:
 - provider: NuGet
   api_key:
@@ -54,7 +50,7 @@ deploy:
   release: Leaf.xNet v$(appveyor_build_version)
   auth_token:
     secure: NQtMOO3yB309cDK/pFWRiQ==
-  artifact: net452;net462;net471;net472;netcoreapp2.0;netcoreapp2.1;netcoreapp2.2
+  artifact: Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.5.2;Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.6.2;Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.7.2;Leaf.xNet_v$(appveyor_build_version)__NET_Framework_4.8;Leaf.xNet_v$(appveyor_build_version)__NET_Standard_2.0
   on:
     branch: master
 only_commits: