fix: move required devDependency to dependencies

Author: psirenny

package.json

@@ -14,6 +14,7 @@
     "fs-extra": "7.0.0",
     "node-fetch": "2.2.0",
     "node-uname": "2.0.0",
+    "npm-run-all": "4.1.3",
     "tempy": "0.2.1"
   },
   "devDependencies": {
@@ -66,7 +67,6 @@
     "greenkeeper-lockfile": "2.7.1",
     "husky": "1.0.1",
     "npm-package-json-lint": "3.3.1",
-    "npm-run-all": "4.1.3",
     "nyc": "13.1.0",
     "remark-cli": "5.0.0",
     "remark-lint-blockquote-indentation": "1.0.2",