Upgrade 'maven-compiler-plugin'

Signed-off-by: Jussi Virtanen <jussi.k.virtanen@gmail.com>
Upgrade 'maven-surefire-plugin'

Signed-off-by: Jussi Virtanen <jussi.k.virtanen@gmail.com>
Upgrade 'maven-assembly-plugin'

Signed-off-by: Jussi Virtanen <jussi.k.virtanen@gmail.com>
Use micro sign instead of Greek small letter mu

Signed-off-by: Jussi Virtanen <jussi.k.virtanen@gmail.com>
Merge pull request #3 from jvirtanen/features/maven-plugins

Upgrade Maven plugins
Merge pull request #4 from jvirtanen/fixes/micro-sign

Use micro sign instead of Greek small letter mu