fix: lodash.isequal runtime error

Execution of `sweater-comb compare` was failing on a runtime error:

```
internal/modules/cjs/loader.js:905
  throw err;
  ^

Error: Cannot find module 'lodash.isequal'
Require stack:
```

without this change.

Let the record show I am not a fan of bundled dependencies, but it's
necessary here due to the conflicts between ajv 6 and 8, both
dependencies of many common tools.

package.json

@@ -51,12 +51,14 @@
     "chai": "^4.3.4",
     "change-case": "^4.1.2",
     "fs-extra": "^10.0.0",
+    "lodash.isequal": "^4.5.0",
     "nice-try": "^3.0.0",
     "yargs": "^17.3.0"
   },
   "bundledDependencies": [
     "@useoptic/api-checks",
     "@useoptic/json-pointer-helpers",
+    "@useoptic/openapi-cli",
     "@useoptic/openapi-io",
     "@useoptic/openapi-utilities"
   ],