title: Nuxt 2.5.0 + Firebase - dependencies were not found
body: <p>I've been using firebase in Nuxt but with the 2.5.0 upgrade I'm getting these errors. Can't seem to figure out what the problem is?</p>
  
  <pre><code> ERROR  Failed to compile with 7 errors                                                                           friendly-errors 13:21:54
  
  These dependencies were not found:                                                                                friendly-errors 13:21:54
                                                                                                                    friendly-errors 13:21:54
  * core-js/fn/array/find in ./node_modules/@firebase/polyfill/dist/index.esm.js                                    friendly-errors 13:21:54
  * core-js/fn/array/find-index in ./node_modules/@firebase/polyfill/dist/index.esm.js                              friendly-errors 13:21:54
  * core-js/fn/object/assign in ./node_modules/@firebase/polyfill/dist/index.esm.js                                 friendly-errors 13:21:54
  * core-js/fn/string/repeat in ./node_modules/@firebase/polyfill/dist/index.esm.js                                 friendly-errors 13:21:54
  * core-js/fn/string/starts-with in ./node_modules/@firebase/polyfill/dist/index.esm.js                            friendly-errors 13:21:54
  * core-js/fn/symbol in ./node_modules/@firebase/polyfill/dist/index.esm.js                                        friendly-errors 13:21:54
  * core-js/fn/symbol/iterator in ./node_modules/@firebase/polyfill/dist/index.esm.js                               friendly-errors 13:21:54
                                                                                                                    friendly-errors 13:21:54
  To install them, you can run: npm install --save core-js/fn/array/find core-js/fn/array/find-index core-js/fn/object/assign core-js/fn/string/repeat core-js/fn/string/starts-with core-js/fn/symbol core-js/fn/symbol/iterator
  </code></pre>