Added net5 and netstandard2.0 targets and bumped version to 1.3.2

Author: elca-lan

src/MaybeSharp/MaybeSharp.csproj

@@ -1,15 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>netcoreapp2.1;netcoreapp3.1;net48</TargetFrameworks>
+    <TargetFrameworks>net5;netcoreapp2.1;netcoreapp3.1;netstandard2.0;net48</TargetFrameworks>
     <PackageProjectUrl>https://github.com/lord-executor/MaybeSharp</PackageProjectUrl>
     <PackageLicenseUrl>https://github.com/lord-executor/MaybeSharp/blob/master/LICENSE</PackageLicenseUrl>
     <RepositoryUrl>https://github.com/lord-executor/MaybeSharp</RepositoryUrl>
     <RepositoryType>git</RepositoryType>
     <Company />
     <PackageDescription>See the project's Github page under https://github.com/lord-executor/MaybeSharp </PackageDescription>
     <Authors>Lukas Angerer</Authors>
-    <Version>1.3.1</Version>
+    <Version>1.3.2</Version>
     <AssemblyVersion>1.3.0.0</AssemblyVersion>
     <FileVersion>1.3.0.0</FileVersion>
     <SignAssembly>true</SignAssembly>