Updated fst version to 0.4 and moved to edition 2018

Cargo.toml

@@ -1,7 +1,8 @@
 [package]
 name = "levenshtein_automata"
-version = "0.1.1"
+version = "0.2.0"
 authors = ["Paul Masurel <[email protected]>"]
+edition = "2018"
 license = "MIT"
 categories = ["text-processing"]
 description = """Creates Levenshtein Automata in an efficient manner."""
@@ -12,7 +13,7 @@ readme = "README.md"
 keywords = ["levenshtein", "automaton", "automata", "fuzzy"]
 
 [dependencies]
-fst = {version="0.3", optional=true, default-features=false}
+fst = {version="0.4", optional=true, default-features=false}
 
 [dev-dependencies]
 levenshtein = "1.0"

README.md

@@ -6,8 +6,6 @@ the levenshtein distance from a given string.
 # Example
 
 ```rust
-extern crate levenshtein_automata;
-
 use levenshtein_automata::{LevenshteinAutomatonBuilder, Distance};
 
 fn main() {

src/lib.rs

@@ -34,11 +34,10 @@ I also tried to explain it in the following [blog post](https://fulmicoton.com/p
 
 #![cfg_attr(test, feature(test))]
 
-#[cfg(feature = "fst_automaton")]
-extern crate fst;
 
 #[cfg(test)]
 extern crate test;
+
 #[cfg(test)]
 mod bench;
 #[cfg(test)]

src/tests.rs

@@ -1,7 +1,5 @@
-extern crate levenshtein;
-
 use std::collections::HashSet;
-use {Distance, LevenshteinNFA, ParametricDFA};
+use crate::{Distance, LevenshteinNFA, ParametricDFA};
 
 fn make_distance(n: u8, max_distance: u8) -> Distance {
     if n > max_distance {