make unicode normalization optional

it's not always necessary or desired, and adds quite a lot to the binary
size (for instance, the problem it solves is pretty much non-existent in
web browsers, and wasm builds are also very sensitive to code size)

1 files changed, 4 insertions, 1 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 7ec13a4..3b79b41 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,10 +12,13 @@ keywords = ["terminal", "vt100"]
 categories = ["command-line-interface", "encoding"]
 license = "MIT"
 
+[features]
+default = ["unicode-normalization"]
+
 [dependencies]
 itoa = "0.4"
 enumset = "0.4"
 log = "0.4"
-unicode-normalization = "0.1"
+unicode-normalization = { version = "0.1", optional = true }
 unicode-width = "0.1"
 vte = "0.3"