Meep - doesn't work anymore with the new version of gatsby.

[landmann]

  Error: [ERR_REQUIRE_ESM]: require() of ES Module /Users/usr/Projects/usr/node_modules/url-join/lib/url-join.js from /Users/usr/Projects/usr/gatsby-config.js not supported.
  Instead change the require of url-join.js in /Users/usr/Projects/usr/gatsby-config.js to a dynamic import() which is available i
  n all CommonJS modules.

  - gatsby-config.js:1 Object.<anonymous>
    /Users/usr/Projects/usr/gatsby-config.js:1:17

  - get-config-file.js:58 getConfigFile
    []/[gatsby]/dist/bootstrap/get-config-file.js:58:22

  - index.js:34 loadConfig
    []/[gatsby]/dist/bootstrap/load-config/index.js:34:46

  - initialize.js:182 initialize
    []/[gatsby]/dist/services/initialize.js:182:51