Version number (package?) for Manual-install.zip 3.0.6 is 3.0.3

[tomgreeEn]

Steps to reproduce:
When installing v 3.0.6 via the manual-install.zip from Releases, the version number inside the zip shows as 3.0.3. Judging by the existence of a previously reported & fixed WP-CLI bug, I assume that the entire package is the old version (rather than just incorrectly versioned).

Expected behaviour
This package should install v3.0.6

[rkajbaf]

I noticed this for the composer version as well. Looking at the code it just looks like somebody forgot to update the version number to match the release.

[krishana7911]

Just wanted to add that the issue still persist in the v3.0.7 update.
The issue also exist in Source code(zip) Source code(tar.gz)