Flatland-rl

Github Action Release failed
Fixed.

Performance improvement

The rail generators (infrastructure) implementation is based on A*. The A* implementation has been improved in terms of calculation time. The main modification concerns the internal data structure which was widely used in the A* algorithm. The used ordered set is replaced by a heap that allows to fetch the nearest nodes in O(1) instead of O(n).

More details: https://github.com/flatland-association/flatland-rl/pull/68

Fixed

- Removed dependency on an old version of `gym` which in turn brought in an old version of `pyglet` that caused issues
on Windows.

Removed

- Dropped support for Python 3.7 because it's end of life.

Changed

- Improved performance by introducing an LRU cache.
- Drastically improved performance by improving `numpy` usage.
- Updated a lot dependencies.
- Cleaned the project structure.
- First release handled by the [flatland association](https://www.flatland-association.org/)!

Fixed

- Fixed a lot of bugs :)
- The tests actually pass now.