Add strong name

Strong-name the assembly, and as that is a breaking change, bump the version to 2.0.0.
Also fix the assembly version to "2.0.0.0", and set the file version based on the AppVeyor build number.

Directory.Build.props

@@ -13,6 +13,7 @@
   </ItemGroup>
   <PropertyGroup>
     <AllowedOutputExtensionsInPackageBuildOutputFolder>$(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb</AllowedOutputExtensionsInPackageBuildOutputFolder>
+    <AssemblyOriginatorKeyFile>$(MSBuildThisFileDirectory)justeat-oss.snk</AssemblyOriginatorKeyFile>
     <Authors>JUSTEAT_OSS</Authors>
     <CodeAnalysisRuleSet>$(MSBuildThisFileDirectory)HttpClientInterception.ruleset</CodeAnalysisRuleSet>
     <Company>Just Eat</Company>
@@ -33,7 +34,9 @@
     <RepositoryType>git</RepositoryType>
     <RepositoryUrl>$(PackageProjectUrl).git</RepositoryUrl>
     <TreatWarningsAsErrors>True</TreatWarningsAsErrors>
-    <VersionPrefix>1.2.3</VersionPrefix>
+    <AssemblyVersion>2.0.0.0</AssemblyVersion>
+    <VersionPrefix>2.0.0</VersionPrefix>
     <VersionSuffix></VersionSuffix>
+    <FileVersion Condition=" '$(APPVEYOR_BUILD_NUMBER)' != '' ">$(VersionPrefix).$(APPVEYOR_BUILD_NUMBER)</FileVersion>
   </PropertyGroup>
 </Project>

appveyor.yml

@@ -1,5 +1,5 @@
 os: Visual Studio 2017
-version: 1.2.3.{build}
+version: 2.0.0.{build}
 
 environment:
   DOTNET_SKIP_FIRST_TIME_EXPERIENCE: true

src/HttpClientInterception/JustEat.HttpClientInterception.csproj

@@ -6,7 +6,9 @@
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <OutputType>Library</OutputType>
     <PackageId>JustEat.HttpClientInterception</PackageId>
+    <PublicSign Condition=" '$(OS)' != 'Windows_NT' ">true</PublicSign>
     <RootNamespace>JustEat.HttpClientInterception</RootNamespace>
+    <SignAssembly>true</SignAssembly>
     <Summary>A .NET library for intercepting server-side HTTP dependencies.</Summary>
     <TargetFrameworks>netstandard1.3;netstandard2.0</TargetFrameworks>
     <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">$(TargetFrameworks);net461</TargetFrameworks>