fix(core): update

ts/datev.plugins.ts

@@ -0,0 +1,2 @@
+const removeme = {};
+export { removeme };

ts/index.ts

@@ -0,0 +1,3 @@
+import * as plugins from './datev.plugins';
+
+export let standardExport = 'Hi there! :) This is an exported string';