Eslint fixes for backend deployment (Fixed)

[QasidLabeed]

Before firebase deploy there are Eslint checks for backend/functions/index.js
Here is the updated file with suggested eslint fixes

const functions = require("firebase-functions");
const admin = require("firebase-admin");
admin.initializeApp();

const db = admin.firestore();

exports.addLike = functions.firestore
    .document("/posts/{creatorId}/userPosts/{postId}/likes/{userId}")
    .onCreate((snap, context) => {
      return db
          .collection("posts")
          .doc(context.params.creatorId)
          .collection("userPosts")
          .doc(context.params.postId)
          .update({
            likesCount: admin.firestore.FieldValue.increment(1),
          });
    });

exports.removeLike = functions.firestore
    .document("/posts/{creatorId}/userPosts/{postId}/likes/{userId}")
    .onDelete((snap, context) => {
      return db
          .collection("posts")
          .doc(context.params.creatorId)
          .collection("userPosts")
          .doc(context.params.postId)
          .update({
            likesCount: admin.firestore.FieldValue.increment(-1),
          });
    });

exports.addFollower = functions.firestore
    .document("/following/{userId}/userFollowing/{FollowingId}")
    .onCreate((snap, context) => {
      return db
          .collection("users")
          .doc(context.params.FollowingId)
          .update({
            followersCount: admin.firestore.FieldValue.increment(1),
          }).then(() => {
            return db
                .collection("users")
                .doc(context.params.userId)
                .update({
                  followingCount: admin.firestore.FieldValue.increment(1),
                });
          });
    });

exports.removeFollower = functions.firestore
    .document("/following/{userId}/userFollowing/{FollowingId}")
    .onDelete((snap, context) => {
      return db
          .collection("users")
          .doc(context.params.FollowingId)
          .update({
            followersCount: admin.firestore.FieldValue.increment(-1),
          }).then(() => {
            return db
                .collection("users")
                .doc(context.params.userId)
                .update({
                  followingCount: admin.firestore.FieldValue.increment(-1),
                });
          });
    });

exports.addComment = functions.firestore.
    document("/posts/{creatorId}/userPosts/{postId}/comments/{userId}")
    .onCreate((snap, context) => {
      return db
          .collection("posts")
          .doc(context.params.creatorId)
          .collection("userPosts")
          .doc(context.params.postId)
          .update({
            commentsCount: admin.firestore.FieldValue.increment(1),
          });
    });

[SimCoderYoutube]

Hi @QasidLabeed !

Thank you for the work! If you are able to create a PR with this I will accept it ASAP!
Thank you for your contribution :)