housekeeping: @kyleshockey/js-yaml -> js-yaml (via #5511)

* `@kyleshockey/js-yaml` -> `js-yaml`

* externalize `esprima`

package.json

@@ -49,7 +49,6 @@
   "dependencies": {
     "@babel/runtime-corejs2": "^7.5.5",
     "@braintree/sanitize-url": "^2.0.2",
-    "@kyleshockey/js-yaml": "^1.0.1",
     "@kyleshockey/object-assign-deep": "^0.4.2",
     "@kyleshockey/xml": "^1.0.2",
     "base64-js": "^1.2.0",
@@ -61,6 +60,7 @@
     "ieee754": "^1.1.8",
     "immutable": "^3.x.x",
     "js-file-download": "^0.4.1",
+    "js-yaml": "^3.13.1",
     "lodash": "^4.17.14",
     "memoizee": "^0.4.12",
     "prop-types": "^15.5.10",