Older versions of Erlang are not installed on the oldest supported Ub…

…untu.

Moved duplicate priv-dir code from other projects to here.

Bumped micro version.

Bumped to 0.16 due to breaking changes.

Updated README and CI/CD.

Bumped micro version for latest feature additions.

Bumped micro version.

Bumped micro version for new func.

Bumped minor version.

Disable 20 in CI/CD due to erl 26 issue.