Ubuntu 18.04 (bionic) installer does not seem to work

When trying to install `allure` on Ubuntu 18.04, following https://docs.qameta.io/allure/#_linux, everything goes well. However when executing `allure --version` afterwards, the following error is occurring:
> allure --version
> allure: command not found

The same on Ubuntu 16.04 seems to work fine.

**Expected behavior**
`allure` should be put in the `PATH` at installation and behaviour should be the same for 18.04 and 16.04.

**Environment (please complete the following information):**

> Linux *** 4.15.0-55-generic #60-Ubuntu SMP Tue Jul 2 18:22:20 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Start with the Linux installation instructions at https://docs.qameta.io/allure/#_linux and reproduce the `allure --version` failure on Ubuntu 18.04, comparing it with Ubuntu 16.04. Done means a fresh Ubuntu 18.04 installation makes the `allure` command available in PATH and the version command works.

Written by the indexing model from the issue text.