I'm not sure about other shared hosting servers in the DH environment, but mine is currently reading as version 7.21.0. The current version is 7.29.0. There've been a number of fixes, additions, and more importantly SECURITY fixes.
I'm particularly looking more towards one of the NTLM fixes, but with regard to keeping a more secure environment, I'd imagine it would make sense to update this library since it's 8 versions out now with a few security bulletins as well.
I'd build it myself but support told me that I shouldn't so I'm requesting the update informally instead.