Don't build net45, net40 on Linux

.travis.yml

@@ -1,10 +1,9 @@
 language: csharp
 solution: plist-cil.sln
 mono:
- - latest
+ - none
- - alpha
- - beta
- - weekly
- - 5.0.0
 dotnet: 2.1.200
-dist: trusty
+dist: trusty
+script:
+ - dotnet build -c Release
+ - dotnet test plist-cil.test/plist-cil.test.csproj

plist-cil.test/packages.config

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<packages>
-  <package id="NUnit" version="2.6.4" targetFramework="net45" />
-</packages>

plist-cil/plist-cil.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp1.0;netstandard1.3;netstandard1.4;netstandard1.6;netcoreapp2.0;netstandard2.0;net40;net45</TargetFrameworks>
+    <TargetFrameworks>netcoreapp1.0;netstandard1.3;netstandard1.4;netstandard1.6;netcoreapp2.0;netstandard2.0</TargetFrameworks>
     <Version>1.16</Version>
     <Authors>Natalia Portillo</Authors>
     <Company>Claunia.com</Company>
@@ -26,6 +26,10 @@ Added examples to README.</PackageReleaseNotes>
     <DisableImplicitFrameworkReferences>true</DisableImplicitFrameworkReferences>
   </PropertyGroup>
 
+  <PropertyGroup Condition="'$(OS)' == 'Windows_NT'">
+    <TargetFrameworks>$(TargetFrameworks);net45;net40</TargetFrameworks>
+  </PropertyGroup>
+
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
     <DefineConstants>TRACE;RELEASE</DefineConstants>
   </PropertyGroup>