version bump 0.3.0 -> 0.4.0

version bump 0.2.7 -> 0.3.0

version bump 0.2.6 -> 0.2.7

version bump 0.2.5 -> 0.2.6

version bump 0.2.4 -> 0.2.5

version bump 0.2.3 -> 0.2.4

version bump 0.2.2 -> 0.2.3

version bump 0.2.1 -> 0.2.2

version bump 0.2.0 -> 0.2.1

version bump 0.1.5 -> 0.2.0