Next v12 upgrade

[FreakinWard]

nextjs v12 upgrade

swc/jest is still experimental - jest tests run as expected.

However, jest coverage reports incorrectly.

With suggested rust configuration

With suggested babel configuration

// jest.config.js

...
transform: {
    '^.+\\.(js|jsx|ts|tsx)$': ['babel-jest', { presets: ['next/babel'] }],
  },
...

[codeclimate]

Code Climate has analyzed commit c95c4db and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (100% is the threshold).

This pull request will bring the total coverage in the repository to 100.0%.

View more on Code Climate.