Update babel monorepo to v7.7.4 (#26)

Author: renovate[bot]

package.json

@@ -34,11 +34,11 @@
     "@aureooms/js-functools": "2.0.3",
     "@aureooms/js-itertools": "3.4.0",
     "@aureooms/js-number": "3.1.0",
-    "@babel/cli": "7.7.0",
-    "@babel/core": "7.7.2",
+    "@babel/cli": "7.7.4",
+    "@babel/core": "7.7.4",
     "@babel/polyfill": "7.7.0",
-    "@babel/preset-env": "7.7.1",
-    "@babel/register": "7.7.0",
+    "@babel/preset-env": "7.7.4",
+    "@babel/register": "7.7.4",
     "ava": "2.4.0",
     "codeclimate-test-reporter": "0.5.1",
     "coveralls": "3.0.8",