feat: Added Theme and migrate to emotion@10.x 🚀 (#286)

* chore: updated emotion dependency

* feat: introduced theme

* refactor: updated emotion styles

* fix: fixed emotion error

* fix: fixed tests

* chore: add missing types

Co-Authored-By: Thomas Klein <tmkn@users.noreply.github.com>

src/utils/test-enzyme.ts

@@ -0,0 +1,19 @@
+import { mount, shallow } from 'enzyme';
+
+import ThemeProvider from '../design-tokens/ThemeProvider';
+
+/* eslint-disable @typescript-eslint/explicit-function-return-type */
+
+const shallowWithTheme = (element: React.ReactElement<any>, ...props): any =>
+  shallow(element, {
+    wrappingComponent: ThemeProvider,
+    ...props,
+  });
+
+const mountWithTheme = (element: React.ReactElement<any>, ...props): any =>
+  mount(element, {
+    wrappingComponent: ThemeProvider,
+    ...props,
+  });
+
+export { mountWithTheme as mount, shallowWithTheme as shallow };