Fix example && MSRV build error

Author: 38

examples/minifb-demo/src/main.rs

@@ -90,8 +90,8 @@ fn main() -> Result<(), Box<dyn Error>> {
 
             chart
                 .configure_mesh()
-                .line_style_1(&GREEN.mix(0.2))
-                .line_style_2(&TRANSPARENT)
+                .bold_line_style(&GREEN.mix(0.2))
+                .light_line_style(&TRANSPARENT)
                 .draw()?;
 
             chart.draw_series(data.iter().zip(data.iter().skip(1)).map(

src/coord/ranged.rs

@@ -46,8 +46,8 @@ impl KeyPointWeight {
     /// Check if this key point weight setting allows light point
     pub fn allow_light_points(&self) -> bool {
         match self {
-            Self::Bold => false,
-            Self::Any => true,
+            KeyPointWeight::Bold => false,
+            KeyPointWeight::Any => true,
         }
     }
 }