Update version in plugin.xml #56

Description

When users install plugins, its version determines as version in plugin.xml. So if users try to install plugin now, they see UnitTestBot-1.0.0.-SNAPSHOT version. We want to make release with the version 2022.5-alpha so we need to update version in plugin.xml.

To Reproduce

Not applicable.

Expected behavior

plugin.xml shows correct plugin version.

Actual behavior

plugin.xml shows incorrect plugin version.

Visual proofs (screenshots, logs, images)

Environment

Not applicable.

Additional context

Not applicable.