Make ignore a mandatory dependency

Cargo.toml

@@ -24,11 +24,12 @@ anyhow = "1.0.71"
 chrono = { version = "0.4.24", default-features = false, features = ["clock"] }
 clap = { version = "4.3.12", features = ["cargo", "wrap_help"] }
 clap_complete = "4.3.2"
-once_cell = "1.17.1"
 env_logger = "0.11.1"
 handlebars = "6.0"
+ignore = "0.4.23"
 log = "0.4.17"
 memchr = "2.5.0"
+once_cell = "1.17.1"
 opener = "0.7.0"
 pulldown-cmark = { version = "0.10.0", default-features = false, features = ["html"] } # Do not update, part of the public api.
 regex = "1.8.1"
@@ -42,7 +43,6 @@ topological-sort = "0.2.2"
 # Watch feature
 notify = { version = "6.1.1", optional = true }
 notify-debouncer-mini = { version = "0.4.1", optional = true }
-ignore = { version = "0.4.20", optional = true }
 pathdiff = { version = "0.2.1", optional = true }
 walkdir = { version = "2.3.3", optional = true }
 
@@ -65,7 +65,7 @@ walkdir = "2.3.3"
 
 [features]
 default = ["watch", "serve", "search"]
-watch = ["dep:notify", "dep:notify-debouncer-mini", "dep:ignore", "dep:pathdiff", "dep:walkdir"]
+watch = ["dep:notify", "dep:notify-debouncer-mini", "dep:pathdiff", "dep:walkdir"]
 serve = ["dep:futures-util", "dep:tokio", "dep:warp"]
 search = ["dep:elasticlunr-rs", "dep:ammonia"]