build: add CommonJS distribution

[privatenumber]

Problem

The ESM migration from #35 is a breaking change (which warrants a major version bump).

This is an intrusive change since all dependent projects will also have to convert to ESM or use a bundler.

Changes

• Revert default package type to CommonJS
• Use pkgroll (bundler) to create a CommonJS and ESM distribution. This allows for the ESM source-code and distribution without forcing dependents to use ESM or a bundler.
• Since normalize-url is an ESM dependency, it's bundled in so that it can also be used in the CJS distribution. This way, we can always pull the latest changes from normalize-url without being stuck on an older version that get no updates.

Other info

Also created another PR improving the regular expression: privatenumber#1