Update robotframework-maven-plugin to 2.0.1

[php-coder]

• https://github.com/robotframework/MavenPlugin/releases/tag/1.8.0
• https://github.com/robotframework/MavenPlugin/releases/tag/1.8.1
• 2.0.0
• 2.0.1

Related: #1535