updates dependency "flat" (#196)

https://www.npmjs.com/package/flat/v/2.0.1

package.json

@@ -27,7 +27,7 @@
   "repository": "https://github.com/okta/okta-sdk-nodejs",
   "dependencies": {
     "deep-copy": "^1.4.2",
-    "flat": "^2.0.1",
+    "flat": "^5.0.2",
     "isomorphic-fetch": "2.2.1",
     "js-yaml": "^3.13.0",
     "lodash": "^4.17.14",
@@ -60,4 +60,4 @@
       "jest-date-mock"
     ]
   }
-}
+}

yarn.lock

@@ -1607,12 +1607,10 @@ flat-cache@^1.2.1:
     rimraf "~2.6.2"
     write "^0.2.1"
 
-flat@^2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/flat/-/flat-2.0.1.tgz#70e29188a74be0c3c89409eed1fa9577907ae32f"
-  integrity sha1-cOKRiKdL4MPIlAnu0fqVd5B64y8=
-  dependencies:
-    is-buffer "~1.1.2"
+flat@^5.0.2:
+  version "5.0.2"
+  resolved "https://registry.yarnpkg.com/flat/-/flat-5.0.2.tgz#8ca6fe332069ffa9d324c327198c598259ceb241"
+  integrity sha512-b6suED+5/3rTpUBdG1gupIl8MPFCAMA0QXwmljLhvCUKcUvdE4gWky9zpuGCcXHOsz4J9wPGNWq6OKpmIzz3hQ==
 
 for-in@^1.0.1, for-in@^1.0.2:
   version "1.0.2"
@@ -2086,7 +2084,7 @@ is-arrayish@^0.2.1:
   resolved "https://registry.yarnpkg.com/is-arrayish/-/is-arrayish-0.2.1.tgz#77c99840527aa8ecb1a8ba697b80645a7a926a9d"
   integrity sha1-d8mYQFJ6qOyxqLppe4BkWnqSap0=
 
-is-buffer@^1.1.5, is-buffer@~1.1.2:
+is-buffer@^1.1.5:
   version "1.1.6"
   resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-1.1.6.tgz#efaa2ea9daa0d7ab2ea13a97b2b8ad51fefbe8be"
   integrity sha512-NcdALwpXkTm5Zvvbk7owOUSvVvBKDgKP5/ewfXEznmQFfs4ZRmanOeKBTjRVjka3QFoN6XJ+9F3USqfHqTaU5w==