v0.4.0

GridWorlds v0.4.0

Diff since v0.3.1

Closed issues:

• RLBase.reward(env) is not defined (#130)

Merged pull requests:

• add Transport env (#129) (@Sid-Bhatia-0)
• fix benchmarking (#131) (@Sid-Bhatia-0)
• simplify internals, boost performance (#132) (@Sid-Bhatia-0)
• fix readme: add file textual_rendering.png (#133) (@Sid-Bhatia-0)
• performance fix in get_grid_inds (#136) (@Sid-Bhatia-0)
• bump version (#137) (@Sid-Bhatia-0)