Package version parsing can give wrong value

[MacFJA]

Hi,

With PhpMetrics v2.3.2 (probably true with previous versions), the package version parsing from Packagist can result in wrong version number.

Example, the package liip/imagine-bundle output the lastest version to be 2.01.0, but the lastest release is 1.9.1.

The issue is from the line https://github.com/phpmetrics/PhpMetrics/blob/master/src/Hal/Metric/System/Packages/Composer/Packagist.php#L40:
It strip all chars that are not a digit or a dot, but in the case of liip/imagine-bundle, a branch (which are display as a version in packagist) is named dev-upgrade-2.0-from-1.0, and so result into 2.01.0.

A quick workaround if to ignore all versions that starts with dev- (which are all branch that does represent a version number)
(And ignoing all versions that ends with -dev will get rid of number branches)

[UFOMelkor]

Fixed in #337