version bump
version bump

- 2.2.0dev

samsonasik/zf2-documentation,rettal/zf2-documentation,gennadiylitvinyuk/zf2-documentation,samsonasik/zf2-documentation,Rud5G/zf2-documentation,akrabat/zf2-documentation,rettal/zf2-documentation,akrabat/zf2-documentation,gennadiylitvinyuk/zf2-documentation,Rud5G/zf2-documentation