Parsing of invalid string changed to valid from 2.9.0 to 2.12.0

[Aukhan]

Hi Guys,
Not sure if this is an issue or an enhancement made during the course of things,
somehow we were stuck on 2.9 and updated to 2.12 recently

earlier(2.9) we would parse things like moment("2016-04-06Tnull").isValid() // gives false
but now(2.12) this kind of parsing returns true with the time set to 00:00:00

Mostly just sharing my experience after the upgrade.

Great work by all of you !

[maggiepint]

If it's okay with you, I'm going to call this the same as #2985 and close this.

I know it doesn't look exactly the same, but I believe it's basically the same issue.
Thanks for letting us know.

[Aukhan]

@maggiepint thanks