on windows allow installations only on windows 10 1803 or newer due to unix socket support

dist/win/resources/main.wxs

@@ -75,6 +75,13 @@
     <Condition Message="A lower version of [ProductName] is already installed. Uninstall it first and then start the setup again. Setup will now exit.">
         <![CDATA[Installed OR NOT OLDEXEINSTALLER]]>
     </Condition>
+    <!-- Cryptomator uses UNIX Sockets, which are supported starting with Windows 10 v1803-->
+    <Property Id="WINDOWSBUILDNUMBER" Secure="yes">
+      <RegistrySearch Id="BuildNumberSearch" Root="HKLM" Key="SOFTWARE\Microsoft\Windows NT\CurrentVersion" Name="CurrentBuildNumber" Type="raw" />
+    </Property>
+    <Condition Message="This application requires Windows 10 version 1803 (build 17134) or newer.">
+      <![CDATA[Installed OR (WINDOWSBUILDNUMBER >= 17134)]]>
+    </Condition>
 
     <!-- Non-Opening ProgID -->
     <DirectoryRef Id="INSTALLDIR">