chore: emotion typings

Author: P0lip

src/@emotion__core.d.ts

@@ -0,0 +1,8 @@
+// a dumb stub, workaround for storybook emotion problem
+// can be removed once Storybook v5 is released and we can have own @emotion/core installed
+declare module '@emotion/core' {
+  import { createElement } from 'react';
+
+  export const jsx: typeof createElement;
+  export const css: Function;
+}