Added omit and extend to shapes

0.0.3

Add `extend` and `omit` methods to `ArrayShapeType` and `ObjectShapeT…

Fixed: Float accepts int and casts automatically

0.0.2

Allow integers as valid input for `FloatType`, update coercion logic,…

Initial Beta release

0.0.1

Rename package to `ztan` and update description in `composer.json`