Fix tag on release 0.5.2

[smford]

The release tag for version 0.5.2 differs in pattern which causes issues with scripts which depend on a tagging pattern. This is a minor typo issue and can easily be fixed, but does cause issues.

All other release tags are in the format:
v0.x.y

whereas the release for 0.5.2 does not include the prefix of "v"

Problem: https://github.com/golang/dep/releases/tag/0.5.2
Example good: https://github.com/golang/dep/releases/tag/v0.5.1
Example good: https://github.com/golang/dep/releases/tag/v0.5.3

See here for list of tags:
https://github.com/golang/dep/tags

What version of dep are you using (dep version)?

0.5.2

[dmitshur]

This is related to issue #2160, which was fixed by creating v0.5.3.

[kevinburke]

I'm not sure of the best course of action, since technically people might be depending on this tag being present. I can also push v0.5.2, but I'm not sure that that fixes your problem either.