fix: chart ref prop type fix (#70)

Author: dangreen

src/Bar.svelte

@@ -7,7 +7,7 @@
 
   interface $$Props<TData = DefaultDataPoint<'bar'>, TLabel = unknown>
     extends Omit<ChartBaseProps<'bar', TData, TLabel>, 'type'> {
-    chart: ChartJS<'bar', TData, TLabel> | null;
+    chart?: ChartJS<'bar', TData, TLabel> | null;
   }
 
   ChartJS.register(BarController);

src/Bubble.svelte

@@ -7,7 +7,7 @@
 
   interface $$Props<TData = DefaultDataPoint<'bubble'>, TLabel = unknown>
     extends Omit<ChartBaseProps<'bubble', TData, TLabel>, 'type'> {
-    chart: ChartJS<'bubble', TData, TLabel> | null;
+    chart?: ChartJS<'bubble', TData, TLabel> | null;
   }
 
   ChartJS.register(BubbleController);

src/Chart.svelte

@@ -10,7 +10,7 @@
     TData = DefaultDataPoint<TType>,
     TLabel = unknown
   > extends ChartBaseProps<TType, TData, TLabel> {
-    chart: ChartJS<TType, TData, TLabel> | null;
+    chart?: ChartJS<TType, TData, TLabel> | null;
   }
 
   function clean(props: SvelteAllProps) {

src/Doughnut.svelte

@@ -7,7 +7,7 @@
 
   interface $$Props<TData = DefaultDataPoint<'doughnut'>, TLabel = unknown>
     extends Omit<ChartBaseProps<'doughnut', TData, TLabel>, 'type'> {
-    chart: ChartJS<'doughnut', TData, TLabel> | null;
+    chart?: ChartJS<'doughnut', TData, TLabel> | null;
   }
 
   ChartJS.register(DoughnutController);

src/Line.svelte

@@ -7,7 +7,7 @@
 
   interface $$Props<TData = DefaultDataPoint<'line'>, TLabel = unknown>
     extends Omit<ChartBaseProps<'line', TData, TLabel>, 'type'> {
-    chart: ChartJS<'line', TData, TLabel> | null;
+    chart?: ChartJS<'line', TData, TLabel> | null;
   }
 
   ChartJS.register(LineController);

src/Pie.svelte

@@ -7,7 +7,7 @@
 
   interface $$Props<TData = DefaultDataPoint<'pie'>, TLabel = unknown>
     extends Omit<ChartBaseProps<'pie', TData, TLabel>, 'type'> {
-    chart: ChartJS<'pie', TData, TLabel> | null;
+    chart?: ChartJS<'pie', TData, TLabel> | null;
   }
 
   ChartJS.register(PieController);

src/PolarArea.svelte

@@ -7,7 +7,7 @@
 
   interface $$Props<TData = DefaultDataPoint<'polarArea'>, TLabel = unknown>
     extends Omit<ChartBaseProps<'polarArea', TData, TLabel>, 'type'> {
-    chart: ChartJS<'polarArea', TData, TLabel> | null;
+    chart?: ChartJS<'polarArea', TData, TLabel> | null;
   }
 
   ChartJS.register(PolarAreaController);

src/Radar.svelte

@@ -7,7 +7,7 @@
 
   interface $$Props<TData = DefaultDataPoint<'radar'>, TLabel = unknown>
     extends Omit<ChartBaseProps<'radar', TData, TLabel>, 'type'> {
-    chart: ChartJS<'radar', TData, TLabel> | null;
+    chart?: ChartJS<'radar', TData, TLabel> | null;
   }
 
   ChartJS.register(RadarController);

src/Scatter.svelte

@@ -7,7 +7,7 @@
 
   interface $$Props<TData = DefaultDataPoint<'scatter'>, TLabel = unknown>
     extends Omit<ChartBaseProps<'scatter', TData, TLabel>, 'type'> {
-    chart: ChartJS<'scatter', TData, TLabel> | null;
+    chart?: ChartJS<'scatter', TData, TLabel> | null;
   }
 
   ChartJS.register(ScatterController);