Bump flyway-core from 8.5.4 to 8.5.8

Bumps [flyway-core](/~https://github.com/flyway/flyway) from 8.5.4 to 8.5.8.
- [Release notes](/~https://github.com/flyway/flyway/releases)
- [Commits](flyway/flyway@flyway-8.5.4...flyway-8.5.8)

---
updated-dependencies:
- dependency-name: org.flywaydb:flyway-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

crawler4j-examples/crawler4j-examples-postgres/pom.xml

@@ -12,7 +12,7 @@
     <properties>
         <postgresql.version>42.3.4</postgresql.version>
         <c3p0.version>0.9.5.5</c3p0.version>
-        <flyway.db.version>8.5.4</flyway.db.version>
+        <flyway.db.version>8.5.8</flyway.db.version>
     </properties>
 
     <dependencies>