Assume true color support on Windows

helix-term/src/lib.rs

@@ -10,8 +10,13 @@ pub mod job;
 pub mod keymap;
 pub mod ui;
 
+#[cfg(not(windows))]
 fn true_color() -> bool {
     std::env::var("COLORTERM")
         .map(|v| matches!(v.as_str(), "truecolor" | "24bit"))
         .unwrap_or(false)
 }
+#[cfg(windows)]
+fn true_color() -> bool {
+    true
+}