Update dependency url-join to v5

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
url-join	4.0.1 -> 5.0.0

---

Release Notes

jfromaniello/url-join (url-join)

v5.0.0

Compare Source

• Add Dependabot config to keep dependencies up-to-date (#​67) (e29fd4c9f6a3a1c29f50262c9323f1a4d8173de4), closes #​67
• Add type definitions for TypeScript users (#​74) (2cd46bcaff009a6701b33e16b1b9788c9a09130d), closes #​74
• Bump mocha from 3.5.3 to 9.2.2 (ab6a39a2170083ebcefecfa0abcf80fc25a103ef)
• Change distributed code to use ECMAScript modules (#​76) (caaafed544786b63b8db78d7df6d238ca1f0c6cb), closes #​76
• Mark package as free of side-effects (#​75) (86eeb03980b166572e02c7bbaf11c98656d04831), closes #​75
• Reduce package size by adding "files" field (#​65) (be56f575c9b723b83cfb066f5649f2cd83efb137), closes #​65
• Regenerate package lockfile (#​73) (b85aec29057ba269618781618e48dc173b941f9b), closes #​73
• Rename master branch to 'main' (ea22d9342d6ad2de68a0132d176bf332507dc189)
• Replace Travis with Github Actions (#​66) (2c0f6951939b86e7d1194fb21cf54cdfb8d9b1cf), closes #​66
• update travis file (02991d8d220339d2073b1e5c1bcd069284c5372a)

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[Sorixelle]

Finally got around to looking at this one today - I don't think it's broken any functionality, but Jest doesn't like it since it only ships ESM. I don't think there's a good way around that without completely reworking the testing setup. Might look into it if we ever do another major version bump.