Gibica

Enhancements

* Fix minor project settings

Enhancements

* Patch the CI pipeline.

Enhancements

* Triggers CI deployment on Pypi with Travis.

Enhancements

* Fix a bug where `return` statements were not evaluated inside compound blocs.
* Function without `return` statement now returns a `NoneType`.
* Re-assignation of a mutable variable now refers to the same underlying object.
* Update documentation.

Enhancements

* New buit-in function: `print()`.
* Recursive functions is now working.
* Allow expressions in function call parameters.
* Handle `return` statements in compound statements (if/else and while blocs).
* Implement a `NoneType` type.
* Update documentation

Enhancements

* Implement function calls and declarations.
* Handle parameters in functions.
* A parameter can be immutable or mutable with the keyword `mut`.
* Implement `return` statements.
* Functions must be declared before called.
* Functions cannot be declared multiple times.
* Parameters cannot be the same within a function declaration.