add acorn and recast

Author: lobsterkatie

package.json

@@ -67,6 +67,7 @@
     "@types/mocha": "^5.2.0",
     "@types/node": "~10.17.0",
     "@types/sinon": "^7.0.11",
+    "acorn": "^8.7.0",
     "chai": "^4.1.2",
     "codecov": "^3.6.5",
     "deepmerge": "^4.2.2",
@@ -81,6 +82,7 @@
     "mocha": "^6.1.4",
     "npm-run-all": "^4.1.5",
     "prettier": "2.5.1",
+    "recast": "^0.20.5",
     "replace-in-file": "^4.0.0",
     "rimraf": "^3.0.2",
     "rollup": "^2.67.1",