NewCache returns a gitmoji cache using the default URL and local storage.

NewCacheWithURLAndCacheFile returns a gitmoji cache of a custom URL and local storage location.

UpdateCache checks the default URL for new gitmoji and updates the cache file in local storage if it is stale.

GitmojiDirName is the name of the directory under the user's home directory to store the gitmoji list.

GitmojiFileName is the name of the file to store the list of gitmoji.

GitmojiURL is the address from which to download the list of gitmoji.

Cache is a local file cache for storing gitmoji.

Gitmoji is a structure with the information about a single gitmoji.