Update Directory.Build.props

Author: SimonCropp

src/Directory.Build.props

@@ -5,7 +5,7 @@
     <Nullable>enable</Nullable>
     <LangVersion>latest</LangVersion>
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
-    <Version>0.3.4</Version>
+    <Version>1.0.0</Version>
     <AssemblyVersion>1.0.0</AssemblyVersion>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
     <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>