updated 1.5 changeset in docs

version 1.4 ready, doc update on tilemap

version 1.4 changeset:

- Added capsule shape.
- Added tilemap world.
- Fixed bug that factor_self and factor_other not working in
composite-shape repel().
- Added option to set collision tags to null for quick reset.
- Docs update.

updated package and npm docs

fixed a tiny bug when two objects of the same properties try to repea…

…l, and updated to version 1.3

release version 1.2

update to version 1.1

### 1.1

- Added repel() to shapes.
- Improved some performance, especially with moving objects aabb
calculations.
- Fixed debug coloring bug with composite shapes.
- Added another example with resolving penetration.
- Extended Vectors API.
- Added render bounding-box functionality to all shapes.
- Fixed world render function to accept if should render grid and
bounding boxes.

small update to readme.md