* remove future annotations to continue support of python 3.6
0.2.3
* bring back compatibility for python 3.6
0.2.2
* generalize mass_adaptors and molarity_derivers
0.2.1
* add mass_adaptor
0.2.0
* breaking API changes: * Composer class instead of Composite. * several composition.py functions have been renamed to improve self-description.
0.1.12
* bug fix when handling complex_topology. store.apply_update() can now go up paths with '..'. * calculate_timestep() for Process supports adaptive timesteps.