fix dependent error.

Fix the error where depending on `rand_regex` with default feature causes
"with features: `regex` but `rand_regex` does not have these features".

Author: kennytm

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rand_regex"
-version = "0.13.0"
+version = "0.13.1"
 authors = ["kennytm <[email protected]>"]
 description = "Generates random strings and byte strings matching a regex"
 repository = "https://github.com/kennytm/rand_regex"
@@ -18,12 +18,12 @@ maintenance = { status = "passively-maintained" }
 
 [features]
 default = ["unicode"]
-unicode = ["regex-syntax/unicode", "regex/unicode"]
+unicode = ["regex-syntax/unicode"]
 
 [dependencies]
 rand = "0.7"
 regex-syntax = { version = "0.6", default-features = false }
 
 [dev-dependencies]
-regex = { version = "1.3", default-features = false, features = ["std"] }
+regex = { version = "1.3", default-features = false, features = ["std", "unicode"] }
 rand_xorshift = "0.2"