build: update babel and its plugins to 7.10.x

The change was partially automated with
$ ./mvnw -Pfrontend frontend:npm -Dfrontend.npm.arguments='uninstall babel-cli babel-preset-env babel-preset-react'
$ ./mvnw -Pfrontend frontend:npm -Dfrontend.npm.arguments='install @babel/core @babel/cli @babel/preset-env @babel/preset-react --save-dev'

See also https://babeljs.io/docs/en/v7-migration

This change also updates vulnerable Babel's transitive dependencies:
- braces (fix #1067)
- lodash (CVE-2019-10744; fix #1082)
- minimist (CVE-2020-7598; fix #1296)

Note that the project wasn't affected by aforementioned CVEs as these dependencies were used only by
Babel during a compile time.

Fix #1441

Author: php-coder