encoding too, are ya

Signed-off-by: Fredrik Adelöw <freben@gmail.com>

plugins/api-docs/src/setupTests.ts

@@ -16,6 +16,10 @@
 
 import '@testing-library/jest-dom';
 
+Object.defineProperty(global, 'TextEncoder', {
+  value: require('util').TextEncoder,
+});
+
 Object.defineProperty(global, 'TextDecoder', {
   value: require('util').TextDecoder,
 });