fix: update dependency @cypress/webpack-preprocessor to v5.4.1 (#238)

Should have better code frames for Cypress 4.6.0 to open failed command right at the source. https://youtu.be/6JMVh8V7DcI

Author: renovate[bot]

package-lock.json

@@ -118,7 +118,7 @@
  },
  "dependencies": {
  "@cypress/code-coverage": "3.7.4",
- "@cypress/webpack-preprocessor": "5.2.1",
+ "@cypress/webpack-preprocessor": "5.4.1",
  "babel-plugin-istanbul": "6.0.0",
  "debug": "4.1.1",
  "find-webpack": "1.8.0",