vcpkg

[michaelkirk]

This is just a dupe of #79, but trying to work around whatever bug is breaking CI.

(my theory is that we won't encounter the bug when bors is running off a branch local to this repo... we'll see)

[michaelkirk]

bors try

[bors[bot]]

try

Build succeeded:

• ci result

[michaelkirk]

This is really old, but just to leave a trail of breadcrumbs...

This PR doesn't represent work that I was bottom lining, I was just trying to take the work from #79 and get CI to pass.

#79 stalled out with this comment: https://github.com/georust/proj/pull/79#discussion_r616119710

[urschrei]

If there really is no way of getting the version from vcpkg, the version is available at runtime. This is obviously not ideal, but it would be feasible to have a Windows-only runtime version compatibility check to guard against instances in which the compile step is successful using an unsupported library version.