0.4

Next minor release is here!

• implemented support for magic relationship properties (setter accepts also an int) #4
• implemented DbalMapper::toCollection() & ::toEntity() return types resolution #5
• implemented Repository::persist*() & ::remove*() return type resolution #1
• added support for composer installer, #6 thanks @mabar

Please test this release and tell us how it works for you! 🎉 Thanks!