fix monaco loader test to not break with statically analyzed import statements

spec/javascripts/repo/monaco_loader_spec.js

 /* global __webpack_public_path__ */
+
 import monacoContext from 'monaco-editor/dev/vs/loader';
+import monacoLoader from '~/repo/monaco_loader';
 
 describe('MonacoLoader', () => {
   it('calls require.config and exports require', () => {
-    spyOn(monacoContext.require, 'config');
-
-    const monacoLoader = require('~/repo/monaco_loader'); // eslint-disable-line global-require
-
-    expect(monacoContext.require.config).toHaveBeenCalledWith({
+    expect(monacoContext.require.getConfig()).toEqual(jasmine.objectContaining({
       paths: {
         vs: `${__webpack_public_path__}monaco-editor/vs`, // eslint-disable-line camelcase
       },
-    });
-    expect(monacoLoader.default).toBe(monacoContext.require);
+    }));
+    expect(monacoLoader).toBe(monacoContext.require);
   });
 });