Update Mend: high confidence minor and patch dependency updates

[mend-for-github-com[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
org.codehaus.mojo:exec-maven-plugin (source)	1.2 -> 1.6.0
org.apache.maven.plugins:maven-compiler-plugin	2.3.2 -> 2.5.1
org.slf4j:slf4j-log4j12 (source)	1.5.0 -> 1.7.36
org.slf4j:slf4j-api (source, changelog)	1.5.0 -> 1.7.36

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Release Notes

qos-ch/slf4j (org.slf4j:slf4j-log4j12)

### [`v1.5.11`](https://redirect.github.com/qos-ch/slf4j/compare/v1.5.10...v1.5.11) [Compare Source](https://redirect.github.com/qos-ch/slf4j/compare/v1.5.10...v1.5.11)

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