SKYPACK_URL: string: Equals the following: https://cdn.skypack.dev
isValidVersion(package_version: string): boolean: Returns if Skypack will accept the passed package version.
isValidPackage(package_id: string): boolean: Returns if Skypack will accept the passed package ID.
getSkypackUrl(package_id: string, minified = true): Promise<string>: Returns the most optimal Skypack URL for a passed package ID, which is usually a pinned URL. If the package ID is invalid, it will be returned.