How to download and install libicu55 package for Ubuntu 18.04?

How to download and install libicu55 package for Ubuntu 18.04?

I ran the command sudo apt-get install couchdb -y then following list appeared.

libicu55


libicu55 was supported until Ubuntu 16.04 Xenial, but it is compatible with 18.04 Bionic as well.

Add the following repository and install the package

sudo add-apt-repository "deb http://security.ubuntu.com/ubuntu xenial-security main"
sudo apt-get update
sudo apt-get install libicu55