feat(async-stream): use net core 3.0

Author: richardschneider

.travis.yml

@@ -2,7 +2,7 @@ language: csharp
 sudo: required
 mono: none
 dist: xenial
-dotnet: 2.2.300
+dotnet: 3.0
 os:
   - linux
   - osx

appveyor.yml

@@ -14,7 +14,7 @@ for:
       secure: NeX5NCOUXsCLc1UjTJjqB9F02FZ8Wq0VsxqTXC8kBdyK6zjxjebrf/9Da2sY1Kql
 
 configuration: Release
-os: Visual Studio 2017
+os: Visual Studio 2019
 
 init:
   - git config --global core.autocrlf input
@@ -55,8 +55,7 @@ build_script:
 
 after_build:
 # Build documentation in doc\_site
-# v2.43 is requiring VS 2019!!!
-  - cmd: choco install docfx -y --version 2.42 --force
+  - cmd: choco install docfx -y
   - cmd: builddocs.cmd
   - cmd: 7z a -tzip docs.zip doc\_site
   - cmd: appveyor PushArtifact docs.zip
@@ -67,7 +66,7 @@ test_script:
 
 after_test: 
 # Generate coverage report
-    - dotnet test -c %CONFIGURATION% -f netcoreapp2.1 --no-build --no-restore test /p:CollectCoverage=true
+    - dotnet test -c %CONFIGURATION% -f netcoreapp3.0 --no-build --no-restore test /p:CollectCoverage=true
     - choco install codecov -y
     - codecov -f "test/coverage.opencover.xml"
     - dotnet tool install --global coveralls.net --version 1.0.0

src/IpfsCore.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netstandard14;netstandard2;net45</TargetFrameworks>
+    <TargetFrameworks>netstandard14;netstandard2;net45;netcoreapp3.0</TargetFrameworks>
     <AssemblyName>Ipfs.Core</AssemblyName>
     <RootNamespace>Ipfs</RootNamespace>
     <DebugType>portable</DebugType>
@@ -63,4 +63,9 @@
   <PropertyGroup Condition=" '$(TargetFramework)' == 'netstandard14'">
     <DefineConstants>NETSTANDARD14</DefineConstants>
   </PropertyGroup>
+
+  <PropertyGroup Condition=" '$(TargetFramework)' == 'netcoreapp3.0'">
+    <DefineConstants>ASYNCSTREAM</DefineConstants>
+  </PropertyGroup>
+
 </Project>

test/IpfsCoreTests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net45;netcoreapp1.1;netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>net45;netcoreapp1.1;netcoreapp2.1;netcoreapp3.0</TargetFrameworks>
 
     <IsPackable>false</IsPackable>
     <DebugType>portable</DebugType>