added firefly

[lesliewelch-zz]

• [x ] 🔍 I have searched the data.js file and confirmed I am not adding a duplicate entry. Note: Different versions of the same show/movie are okay to add such as Lion King (1994) and Lion King (2019) or Rent (movie) and Rent (musical).
• [x ] 🌈 I have added a single year under year. Note: Do not add ranges such as 2017-2019.
• [x ] 📅 I have added a type from one of the following: movie , tv or musical.
• [x ] 🔗 I have added the IMDB page or Playbill archive page under itemLink.
• [x ] 3️⃣ I have at least three emojis listed under emojiImgs.
• [x ] 5️⃣ I have a maximum of five emojis listed under emojiImgs.
• [x ] 👍 My pull request has a descriptive title (such as Added The Lion King or Added Black Panther, The Avengers: Endgame and Thor).
• [x ] ⭐ My genres are all inside of square brackets [ ] and each are individually wrapped in quotation marks and have a comma between each one. (such as submitting this "genres": ["adventure","mystery","animation"] and not this "genres":["adventure, mystery, animation"]).
• [x ] 🖍️ I have placed the new show(s) or movie(s) in alphabetical order based on title. If the show or movie starts with 'the', then use the second word to alphabetize.