fix: enforce require.resolve for the default preset

[merceyz]

In order to support Yarn 2/PnP, conventional-changelog-conventionalcommits must be declared in package.json and referenced using require.resolve.

Requires conventional-changelog/conventional-changelog#530

[merceyz]

Waiting for conventional-changelog/conventional-changelog#530 to be published under the latest tag

cc @tommywo

[merceyz]

Tests are passing locally, not sure what's going on

[coveralls]

Coverage increased (+0.0001%) to 99.897% when pulling dc7f69a on merceyz:pnp into 63300a9 on conventional-changelog:master.