Upgrade term 0.5 -> 0.6.1

[repi]

Upgrade to latest term crate.

We ran into an issue where color-backtrace was brining in the older version of term that used dirs 1.0 instead of 2.0 which brought in redox_users which brought in an old version of crossbeam that uses the old memoffset 0.2.1 crate which has a security vulnerability reported in it:

ID:	 RUSTSEC-2019-0011
Crate:	 memoffset
Version: 0.2.1
Date:	 2019-07-16
URL:	 https://github.com/Gilnaa/memoffset/issues/9#issuecomment-505461490
Title:	 Flaw in offset_of and span_of causes SIGILL, drops uninitialized memory of arbitrary type on panic in client code
Solution: upgrade to: >= 0.5.0

Update: Turns out the actual fix for the old memoffset crate and security vulnerability was sru-systems/rust-argon2#17 but this is still good to have so one uses the latest versions.

[athre0z]

Thanks!