Line height is relative to fontSize in flutter (#76)

Author: gouthamsrikar

packages/backend/src/flutter/flutterTextBuilder.ts

@@ -88,7 +88,7 @@ export class FlutterTextBuilder extends FlutterDefaultBuilder {
           "TextDecoration.none"
         ),
         // textTransform: textTransform,
-        height: lineHeight,
+        height: lineHeight/fontSize,
         letterSpacing: letterSpacing,
       });