Update babel monorepo to v7.13.8

Author: renovate-bot

package.json

@@ -36,10 +36,10 @@
     "@aureooms/js-itertools": "4.1.0",
     "@aureooms/js-random": "2.0.0",
     "@babel/cli": "7.13.0",
-    "@babel/core": "7.13.1",
+    "@babel/core": "7.13.8",
     "@babel/polyfill": "7.12.1",
-    "@babel/preset-env": "7.13.5",
-    "@babel/register": "7.13.0",
+    "@babel/preset-env": "7.13.8",
+    "@babel/register": "7.13.8",
     "ava": "3.15.0",
     "coveralls": "3.1.0",
     "esdoc": "1.1.0",