Update StyleCopAnalyzers to 1.2.0-beta.406

[stephentoub]

Primarily to ingest the updates that support C# 10 language features, e.g. that structs can now have parameterless ctors.

[ghost]

Tagging subscribers to this area: @dotnet/area-meta
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Primarily to ingest the updates that support C# 10 language features, e.g. that structs can now have parameterless ctors.

Author:	stephentoub
Assignees:	stephentoub
Labels:	area-Meta
Milestone:	-

[danmoseley]

Add missing newlines at end of files to satisfy changes to SA1518

Maybe we should disable this rule for this repo? As far as I know it's a convention on Unix only because it's convenient for some operations like appending files, counting lines etc. Seems like a low value thing to break a build.

[stephentoub]

Maybe we should disable this rule for this repo? As far as I know it's a convention on Unix only because it's convenient for some operations like appending files, counting lines etc. Seems like a low value thing to break a build.

I don't have a strong opinion, but the overwhelming majority of our files already do this, and VS adds them automatically, so I don't think it's a big deal to get clean and then stay clean.