Download failure from Maven central / unknown dependency - spotbugs 4.0.0-beta4

When I try to run a build with the current spotbugs-dependency I get build failures:

`Failed to execute goal com.github.spotbugs:spotbugs-maven-plugin:3.1.12.2:spotbugs (spotbugs) on project fotorenamer: Execution spotbugs of goal com.github.spotbugs:spotbugs-maven-plugin:3.1.12.2:spotbugs failed: Plugin com.github.spotbugs:spotbugs-maven-plugin:3.1.12.2 or one of its dependencies could not be resolved: Failure to find com.github.spotbugs:spotbugs:jar:4.0.0-beta4 in https://maven-central.storage-download.googleapis.com/repos/central/data/ was cached in the local repository, resolution will not be reattempted until the update interval of google-maven-central has elapsed or updates are forced -> [Help 1]`

https://travis-ci.org/ottlinger/fotorenamer/jobs/588822596

Is there a way to trigger a refresh on Travis Maven caches?
https://mvnrepository.com/artifact/com.github.spotbugs/spotbugs/4.0.0-beta4
is delivered via Maven central as a local build proves.

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