use reflow to migrate from flow to typescript

scm-ui/ui-extensions/src/testing/Label.tsx

@@ -0,0 +1,13 @@
+import React from 'react';
+
+type Props = {
+  value: string;
+};
+
+class Label extends React.Component<Props> {
+  render() {
+    return <label>{this.props.value}</label>;
+  }
+}
+
+export default Label;