Make composer respect dependencies version

[Awkan]

Problem

There is a confusion in composer.json file between ~ and ^.
Indeed, you define your versions like ^ but use ~.
e.g. "knplabs/gaufrette":"~0.1.7|~0.2|~0.3|~0.4|~0.5|~0.6" is the SemVer definition but ~ is inapropriate.

~0.2 = >0.2.0 && < 1.0.0
^0.2 = >0.2.0 && < 0.3.0

Solution

• Use ^ for each dependencies (Which is more SemVer friendly !)
• Use ~ for it appropriate usage (e.g. "knplabs/gaufrette":"~0.1.7|~0.2|~0.3|~0.4|~0.5|~0.6" would be "knplabs/gaufrette":"~0.1.7|~0.2") (BUT ^ is better !)