language: csharp
mono: none
dotnet: 2.1.300
install:
  - dotnet restore
script:
  - dotnet build
  - dotnet test

language: csharp
mono: none
dotnet: 2.1.300
install:
  - dotnet restore
script:
  - dotnet build
  - dotnet test ./Core/Msg.Core.Specs/Msg.Core.Specs.csproj

Use more specific test command
Use more specific test command

I think that the older version of MSBuild/dotnet being used on Travis
causes the build to fail where newer versions don't. By using a more
specific path to the test assembly it should hopefully solve this.
