Update ASF to .NET Core 3.0 (#1427)

* Initial bump to .net core 3.0

* Update cc.sh

* Update appveyor.yml

* Update ArchiSteamFarm.csproj

* Update appveyor.yml

* Update .travis.yml

* Build corrections

* Cleanup

* Update .travis.yml

* Don't publish trimmed for now

* Update ArchiSteamFarm.csproj

tools/rcedit/LICENSE.md

@@ -1,20 +0,0 @@
-Copyright (c) 2013 GitHub Inc.
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

tools/rcedit/README.md

@@ -1,10 +0,0 @@
-rcedit
-===================
-
-**[Latest release](https://github.com/electron/rcedit/releases/latest)**
-
-**[Source](https://github.com/electron/rcedit)**
-
----
-
-This tool is being used by our CI for injecting ASF icon into Windows dotnet binary, until https://github.com/dotnet/cli/issues/3267 is eventually dealt with.