This removes our nightly requirement but sadly it adds a requirement for
things that are kept inside a Python class to be Send. Luckily for us
almost everything in Tantivy is Send, except for the Query trait.
This patch works around this by keeping the parser and query string
inside our python Query object. This sadly means that we are going to
parse the query string twice.
* Adding Term, Field and delete_term API mapping
* Fixing test
* Fixing code doc
* Removing Term and Field and nesting code on delete_term
* Fixing lint
* Delete_documents and documentation
* Fixing style and testing exceptions
* Fixing missing return
* Fixing fmt
The new() method using pyo3 does not return self, pyo3 handles some
python magic for us instead.
Disable the clippy warning about not returning self in new since it does
not apply to us.
Damir Jelić
Paul Masurel
Ramon Navarro Bosch