fix: Don't crash when highlighting JS

It appears that the `regex-fancy` engine fall down flat here and we need
to use `regex-onig`, which is what `bat` uses.

Fixes #71

Author: epage

Cargo.lock

@@ -39,7 +39,7 @@ concolor-clap = { version = "0.1.0", features = ["api"] }
 proc-exit = "2.0.1"
 human-panic = "1.1.3"
 anyhow = "1.0.68"
-syntect = { version = "5.0.0", default-features = false, features = ["parsing", "regex-fancy"] }
+syntect = { version = "5.0.0", default-features = false, features = ["parsing", "regex-onig"] }
 terminal_size = "0.2.3"
 textwrap = "0.16.0"
 anstyle = "0.3.1"

Cargo.toml

@@ -61,15 +61,9 @@ fn js_highlight_panics() {
         .current_dir(root_path)
         .env("CLICOLOR_FORCE", "1")
         .assert()
-        .failure()
-        .stdout_eq(
-            "\
-",
-        )
+        .success()
         .stderr_matches(
             "\
-thread 'main' panicked at 'regex string should be pre-tested: [..]
-note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
 ",
         );