fix build

Author: jtpio

src/diff/codemirror.ts

@@ -91,6 +91,7 @@ export async function createCodeMirrorDiffWidget(
     cellFooterTracker,
     originalSource,
     newSource,
+    trans,
     showActionButtons = true,
     openDiff = true
   } = options;
@@ -101,7 +102,8 @@ export async function createCodeMirrorDiffWidget(
     cell,
     cellFooterTracker,
     showActionButtons,
-    openDiff
+    openDiff,
+    trans
   });
 
   diffWidget.addClass('jupyterlab-cell-diff');

src/widget.ts

@@ -1,5 +1,5 @@
 import { ICellModel } from '@jupyterlab/cells';
-import { nullTranslator, TranslationBundle } from '@jupyterlab/translation';
+import { TranslationBundle } from '@jupyterlab/translation';
 import { checkIcon, ToolbarButton, undoIcon } from '@jupyterlab/ui-components';
 import { Widget } from '@lumino/widgets';
 import { ICellFooterTracker } from 'jupyterlab-cell-input-footer';