tests: upgrade dependencies and simplify commands

Author: filipedeschamps

.babelrc

@@ -2,8 +2,7 @@
   "presets": ["@babel/preset-env"],
   "plugins": [
     [
-      "babel-plugin-transform-builtin-extend",
-      { "globals": ["Error"] }
+      "@babel/plugin-transform-runtime"
     ]
   ]
 }

.mocharc.json

@@ -0,0 +1,4 @@
+{
+    "timeout": 60000,
+    "require": "@babel/register"
+}