adding react-diff-viewer package to view diffs between revisions

dashboard/package.json

@@ -48,6 +48,7 @@
     "react-ace": "^9.1.3",
     "react-color": "^2.19.3",
     "react-datepicker": "^4.8.0",
+    "react-diff-viewer": "^3.1.1",
     "react-dom": "^16.13.1",
     "react-error-boundary": "^3.1.3",
     "react-hot-toast": "^2.4.0",
@@ -81,10 +82,12 @@
     "@testing-library/jest-dom": "^4.2.4",
     "@testing-library/react": "^9.3.2",
     "@testing-library/user-event": "^7.1.2",
+    "@types/ace-diff": "^2.1.1",
     "@types/chroma-js": "^2.1.4",
     "@types/color": "^3.0.3",
     "@types/d3-array": "^2.9.0",
     "@types/d3-time-format": "^3.0.0",
+    "@types/diff": "^5.0.2",
     "@types/jest": "^24.0.0",
     "@types/js-base64": "^3.0.0",
     "@types/js-yaml": "^4.0.1",