build/build.ps1: Added Powershell version number check
build/build.ps1: Added Powershell version number check

sisve/lucenenet,jeme/lucenenet,NightOwl888/lucenenet,apache/lucenenet,apache/lucenenet,jeme/lucenenet,apache/lucenenet,sisve/lucenenet,NightOwl888/lucenenet,jeme/lucenenet,NightOwl888/lucenenet,apache/lucenenet,NightOwl888/lucenenet,jeme/lucenenet