Bumped slf4j to v1.7.26
<osgi.core.version>6.0.0</osgi.core.version>
<cxf.version>3.3.1</cxf.version>
- <slf4j.version>1.7.25</slf4j.version>
+ <slf4j.version>1.7.26</slf4j.version>
<jackson.version>2.9.8</jackson.version>
<!-- when this is next upgraded, see if we can get rid of
javax.activation dependency in tika-server -->
