levenshtein/regex: move levenshtein, remove regex

This is where the Levenshtein automata originally lived. I originally
moved it out of the crate in order to reduce dependencies. But we can
instead just make it an optional feature.

Instead of moving fst-regex back into the crate as well, we instead
recommend using `regex-automata`. `regex-automata` is basically the
productionized version of "compile a regex to a DFA," which is exactly
what we want.

Cargo.toml

@@ -15,8 +15,9 @@ license = "Unlicense/MIT"
 edition = "2018"
 
 [features]
-mmap = ["memmap"]
 default = ["mmap"]
+mmap = ["memmap"]
+levenshtein = ["utf8-ranges"]
 
 [[bench]]
 name = "build"
@@ -33,11 +34,10 @@ bench = true
 [dependencies]
 byteorder = "1"
 memmap = { version = "0.6.0", optional = true }
+utf8-ranges = { version = "1", optional = true }
 
 [dev-dependencies]
 fnv = "1.0.5"
-fst-levenshtein = { version = "0.2", path = "fst-levenshtein" }
-fst-regex = { version = "0.2", path = "fst-regex" }
 lazy_static = "0.2.8"
 quickcheck = { version = "0.7", default-features = false }
 rand = "0.5"

fst-levenshtein/Cargo.toml

@@ -1,9 +1,9 @@
 [package]
 name = "fst-levenshtein"
-version = "0.2.1"  #:version
+version = "0.3.0"  #:version
 authors = ["Andrew Gallant <jamslam@gmail.com>"]
 description = """
-Search finite state transducers with fuzzy queries using Levenshtein automata.
+DEPRECATED. Use 'fst' crate with 'levenshtein' feature instead.
 """
 documentation = "https://docs.rs/fst-levenshtein"
 homepage = "https://github.com/BurntSushi/fst"

fst-regex/Cargo.toml

@@ -1,9 +1,9 @@
 [package]
 name = "fst-regex"
-version = "0.2.2"  #:version
+version = "0.3.0"  #:version
 authors = ["Andrew Gallant <jamslam@gmail.com>"]
 description = """
-Search finite state transducers with regular expression.
+DEPRECATED. Use 'regex-automata' crate with 'fst1' feature instead.
 """
 documentation = "https://docs.rs/fst-regex"
 homepage = "https://github.com/BurntSushi/fst"