add fast-deep-equal

Author: mikeharder

package-lock.json

@@ -16,6 +16,7 @@
     "@ts-common/source-map": "0.5.0",
     "@ts-common/string-map": "0.3.0",
     "autorest": "^3.8.0",
+    "fast-deep-equal": "^3.1.3",
     "js-yaml": "^4.1.0",
     "json-pointer": "0.6.2",
     "json-refs": "^3.0.15",