non-root install script fails to install 6.0.4 on ubuntu18

Steps:

1. Login as nonroot user to an aws ubuntu18 machine
2. Download ubunut18 deb package for 6.0.4
3. git clone non root install script
4. mkdir ~/couchbase-home
5. cd into non root install script directory
6. Run command to install:

ubuntu@ip-172-31-45-222:~/cb-non-package-installer$ ./cb-non-package-installer --install --install-location ../couchbase-home --package ../couchbase-server-enterprise_6.0.4-3097-ubuntu18.04_amd64.deb
2020/06/30T23:29:18 ERROR: Cannot install Couchbase Server missing dependency: " libncurses5 (>= 6)"

7. Check to ensure libncurses5 (>= 6) is installed:

ubuntu@ip-172-31-45-222:~/cb-non-package-installer$ dpkg -l | grep libncurses5
ii libncurses5:amd64 6.1-1ubuntu1.18.04 amd64 shared libraries for terminal handling