Reduce dependencies on lodash (#1467)

* assign -> Object.assign

* replace isundefined

* remove forEach

* remove some

* remove reduce

* remove keys

* remove map

* remove includes

* remove filter

* remove last

* remove isstring

* remove every

* remove rearg

* remove indexOf

* remove values

* remove startswith

* remove first and pick

* build smaller lodash

* remove lodash.isequal package

* add lodash-cli dev dependency

* add lodash script

* test fix

* Revert "build smaller lodash" This reverts commit 979446e57f60b29cb5d377b54efe91cfbeae0707.

* upgrade npm

* change ===/!== undefined to ==/!= null

package.json

@@ -26,7 +26,6 @@
     "https-proxy-agent": "^5.0.0",
     "jsonschema": "1.2.2",
     "lodash": "^4.17.4",
-    "lodash.isequal": "^4.5.0",
     "ripple-address-codec": "^4.1.1",
     "ripple-binary-codec": "^1.1.3",
     "ripple-keypairs": "^1.0.3",