Update to Selenium 3.7

[pbolduc]

Updated project references to target latest Selenium version.

[ipjohnson]

I've created a new branch for this work and done an initial checkin (it compiles but need to do testing)

[ipjohnson]

Nuget feed for nightly build
https://ci.appveyor.com/nuget/seleniumfixture-nightly

[ipjohnson]

@pbolduc I'm interested in doing an pre-release of this to nuget. Do you have any other issues/changes you'd like to see in it before pushing?

[pbolduc]

No I do not.

[ipjohnson]

Ok I've pushed an alpha version to nuget

[ipjohnson]

@pbolduc were you able to do any testing on this version?

[pbolduc]

TLDR: No.

I ran into some initial problems, but I think it was a problem on my side. I haven't been working on the Selenium tests since last fall.