Requesting a new version

[avikivity]

I'm seeing good results from the clang module support (3ad5944), and would like a formal release so my colleagues can enjoy it too.

[avikivity]

@sylvestre could we have a new release?

[sylvestre]

sure, i will do it in the next few days max

[sylvestre]

done:
https://github.com/mozilla/sccache/releases/tag/v0.15.0

[avikivity]

Thanks!