Update devDependencies

* mocha   ^7.1.1  →   ^7.1.2
* xo     ^0.29.1  →  ^0.30.0

Author: XhmikosR

package-lock.json

@@ -32,10 +32,10 @@
     "send": "^0.17.1"
   },
   "devDependencies": {
-    "mocha": "^7.1.1",
+    "mocha": "^7.1.2",
     "nyc": "^15.0.1",
     "should": "^13.2.3",
-    "xo": "^0.29.1"
+    "xo": "^0.30.0"
   },
   "engines": {
     "node": ">=10"