fix(package): require-from-string memory leak, updates `cosmiconfig…

…` v2.1.0...4.0.0 (`dependencies`)

BREAKING CHANGE: requires `node >= v4.0.0`
BREAKING CHANGE: removes `argv` option (`options.argv`)
BREAKING CHANGE: removes `--config` parsing

package.json

@@ -17,7 +17,7 @@
     "release": "commitlint --to 'HEAD' && standard-version"
   },
   "dependencies": {
-    "cosmiconfig": "^2.1.0",
+    "cosmiconfig": "^4.0.0",
     "import-cwd": "^2.0.0"
   },
   "devDependencies": {