* Fix Import-Package entry for org.slf4j.
* Use same number of components in version range for org.slf4j.
* Use versionmask macro to derive upper bound for SLF4J.
* Update pom.xml
Co-authored-by: Piotr P. Karwasz <piotr@github.copernik.eu>
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Co-authored-by: Gary Gregory <garydgregory@users.noreply.github.com>
Co-authored-by: Piotr P. Karwasz <piotr@github.copernik.eu>