Drop .NET Core 2.2 + 3.0 that reached end of life

appveyor.yml

@@ -24,8 +24,6 @@ install:
 - sh: curl -OsSL https://dot.net/v1/dotnet-install.sh
 - sh: chmod +x dotnet-install.sh
 - sh: ./dotnet-install.sh --version 3.1.300
-- sh: ./dotnet-install.sh --version 3.0.3 --runtime dotnet
-- sh: ./dotnet-install.sh --version 2.2.7 --runtime dotnet
 - sh: ./dotnet-install.sh --version 2.1.18 --runtime dotnet
 - sh: export PATH="$HOME/.dotnet:$PATH"
 before_build:

csmin.cmd

@@ -1 +1 @@
-@dotnet run --no-launch-profile -f netcoreapp3.0 -p "%~dp0src\CSharpMinifierConsole" -- %*
+@dotnet run --no-launch-profile -f netcoreapp3.1 -p "%~dp0src\CSharpMinifierConsole" -- %*

csmin.sh

@@ -1,3 +1,3 @@
 #!/usr/bin/env sh
 set -e
-dotnet run --no-launch-profile -f netcoreapp3.0 -p "$(dirname "$0")/src/CSharpMinifierConsole" -- "$@"
+dotnet run --no-launch-profile -f netcoreapp3.1 -p "$(dirname "$0")/src/CSharpMinifierConsole" -- "$@"

src/CSharpMinifierConsole/CSharpMinifierConsole.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFrameworks>netcoreapp3.1;netcoreapp3.0;netcoreapp2.2;netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1;netcoreapp2.1</TargetFrameworks>
     <VersionPrefix>1.3.0</VersionPrefix>
     <PackAsTool>true</PackAsTool>
     <ToolCommandName>csmin</ToolCommandName>

tests/CSharpMinifier.Tests.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp3.1;netcoreapp3.0;netcoreapp2.2;netcoreapp2.1</TargetFrameworks>
+    <TargetFrameworks>netcoreapp3.1;netcoreapp2.1</TargetFrameworks>
     <LangVersion>8</LangVersion>
     <IsPackable>false</IsPackable>
   </PropertyGroup>