fix: upgrade multiple dependencies with Snyk

Snyk has created this PR to upgrade:
  - @babel/cli from 7.4.4 to 7.8.4.
    See this package in NPM: https://www.npmjs.com/package/@babel/cli
  - @babel/core from 7.4.4 to 7.8.4.
    See this package in NPM: https://www.npmjs.com/package/@babel/core
  - @babel/plugin-proposal-decorators from 7.4.4 to 7.8.3.
    See this package in NPM: https://www.npmjs.com/package/@babel/plugin-proposal-decorators
  - @babel/plugin-proposal-export-namespace-from from 7.2.0 to 7.8.3.
    See this package in NPM: https://www.npmjs.com/package/@babel/plugin-proposal-export-namespace-from
  - @babel/plugin-proposal-function-sent from 7.2.0 to 7.8.3.
    See this package in NPM: https://www.npmjs.com/package/@babel/plugin-proposal-function-sent
  - @babel/plugin-proposal-numeric-separator from 7.2.0 to 7.8.3.
    See this package in NPM: https://www.npmjs.com/package/@babel/plugin-proposal-numeric-separator
  - @babel/plugin-proposal-throw-expressions from 7.2.0 to 7.8.3.
    See this package in NPM: https://www.npmjs.com/package/@babel/plugin-proposal-throw-expressions
  - @babel/polyfill from 7.4.4 to 7.8.3.
    See this package in NPM: https://www.npmjs.com/package/@babel/polyfill
  - @babel/preset-env from 7.4.4 to 7.8.4.
    See this package in NPM: https://www.npmjs.com/package/@babel/preset-env
  - @babel/preset-react from 7.0.0 to 7.8.3.
    See this package in NPM: https://www.npmjs.com/package/@babel/preset-react
  - @babel/runtime from 7.4.4 to 7.8.4.
    See this package in NPM: https://www.npmjs.com/package/@babel/runtime

See this project in Snyk:
https://app.snyk.io/org/o330oei/project/2583c45e-b7d0-4190-bcb7-4b55edb933d5?utm_source=github&utm_medium=upgrade-pr