Updated _MSVC_STL_UPDATE to October 2020

[praveenojha33]

Fixes #1338 : I have updated _MSVC_STL_UPDATE to October 2020

[CaseyCarter]

Hi, Praveen! This looks great. Thanks!

[StephanTLavavej]

Thanks for updating this version macro, and congratulations on your first microsoft/STL commit! 🎉 😸 🚀

FYI - When we merged your PR, it appeared as co-authored by "praveenojha33 and Praveen Ojha". We've seen this happen before, so we know what causes this. What happened is that the commit that you pushed to your branch, which you used to create this PR, was tagged with an author email address that's different from whatever email address you've registered with GitHub.

You can fix this (which will be effective "retroactively", if you look at the microsoft/STL commit history) by registering an additional email address with GitHub. I've done this myself (as my GitHub account was created with my personal address, but I often push commits tagged with my work address). The process is:

• Click on your avatar at the upper right of the screen
• Click "Settings"
• Click "Emails"
• Use "Add email address".

Hope this helps!