fixup! build: run integration tests in sandbox and with RBE

Add missing dep

Author: devversion

integration/ng-update-v13/package.json

@@ -30,6 +30,7 @@
     "@angular/compiler-cli": "file:../../node_modules/@angular/compiler-cli",
     "@types/jasmine": "~3.9.0",
     "@types/node": "^12.11.1",
+    "diff": "^5.0.0",
     "glob": "^7.2.0",
     "jasmine-core": "~3.9.0",
     "karma": "~6.3.0",

integration/ng-update-v13/yarn.lock

@@ -2735,6 +2735,11 @@ di@^0.0.1:
   resolved "https://registry.yarnpkg.com/di/-/di-0.0.1.tgz#806649326ceaa7caa3306d75d985ea2748ba913c"
   integrity sha1-gGZJMmzqp8qjMG112YXqJ0i6kTw=
 
+diff@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-5.0.0.tgz#7ed6ad76d859d030787ec35855f5b1daf31d852b"
+  integrity sha512-/VTCrvm5Z0JGty/BWHljh+BAiw3IK+2j87NGMu8Nwc/f48WoDAC395uomO9ZD117ZOBaHmkX1oyLvkVM/aIT3w==
+
 dir-glob@^3.0.1:
   version "3.0.1"
   resolved "https://registry.yarnpkg.com/dir-glob/-/dir-glob-3.0.1.tgz#56dbf73d992a4a93ba1584f4534063fd2e41717f"