rename prolog_parser_rebis to prolog_parser

also remove remaining extern crate statements that slipped through earlier

crates/prolog_parser/tests/parse_tokens.rs

@@ -1,8 +1,6 @@
-extern crate prolog_parser_rebis;
-
-use prolog_parser_rebis::ast::*;
-use prolog_parser_rebis::lexer::{Lexer, Token};
-use prolog_parser_rebis::tabled_rc::TabledData;
+use prolog_parser::ast::*;
+use prolog_parser::lexer::{Lexer, Token};
+use prolog_parser::tabled_rc::TabledData;
 
 use std::rc::Rc;