updated version to 4.0.0

Author: feO2x

Code/Light.GuardClauses/CreateSignedNuGetPackage.bat

@@ -1 +1 @@
-msbuild Light.GuardClauses.csproj /t:rebuild /t:pack /p:Configuration=Release /p:SignAssembly=true /p:AssemblyOriginatorKeyFile=bin\Light.GuardClauses.snk
+msbuild Light.GuardClauses.csproj /t:clean;build;pack  /p:Configuration=Release /p:SignAssembly=true /p:AssemblyOriginatorKeyFile=bin\Light.GuardClauses.snk

Code/Light.GuardClauses/Light.GuardClauses.csproj

@@ -4,7 +4,7 @@
     <TargetFrameworks>netstandard2.0;netstandard1.0;net45;net40;sl5;net35;net35-cf</TargetFrameworks>
     <LangVersion>7.2</LangVersion>
     <Description>A lightweight .NET library for expressive Guard Clauses.</Description>
-    <Version>3.5.0</Version>
+    <Version>4.0.0</Version>
     <Authors>Kenny Pflug</Authors>
     <Company>Kenny Pflug</Company>
     <Copyright>Copyright © Kenny Pflug 2016 - 2018</Copyright>
@@ -14,6 +14,11 @@
     <RepositoryType>Git</RepositoryType>
     <PackageTags>Assertions Preconditions GuardClauses DesignByContract DbC</PackageTags>
     <DocumentationFile>bin\$(Configuration)\$(TargetFramework)\$(AssemblyName).xml</DocumentationFile>
+    <PackageReleaseNotes>Light.GuardClauses 4.0
+IMPORTANT NOTE: there are a lot of breaking changes in between version 3.5 and 4.0 - mainly because a lot of assertions were removed. If you are missing a particular assertion and think it should come back, please open an issue and let me know.
+
+See the complete list of new features and changes on https://github.com/feO2x/Light.GuardClauses/releases/tag/v4.0.0
+    </PackageReleaseNotes>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(TargetFramework)' == 'net35'">