feat: add Null to MockFileStream to shadow the static Stream.Null field#1025

mergify[bot] merged 5 commits into

TestableIO:mainTestableIO/System.IO.Abstractions:mainfrom

vbreuss:topic/vb/add-null-to-mockfilestreamvbreuss/System.IO.Abstractions:topic/vb/add-null-to-mockfilestreamCopy head branch name to clipboard