fix: upgrade org.apache.maven:maven-core from 3.6.0 to 3.6.3

Snyk has created this PR to upgrade org.apache.maven:maven-core from 3.6.0 to 3.6.3.

See this package in Maven Repository:
https://mvnrepository.com/artifact/org.apache.maven/maven-core/

See this project in Snyk:
https://app.snyk.io/org/leonardehrenfried/project/001b6a4a-f4a0-4d83-8970-b2e43838db27?utm_source=github&utm_medium=upgrade-pr

pom.xml

@@ -29,7 +29,7 @@
     <maven.javadoc.failOnError>false</maven.javadoc.failOnError>
     <maven.site.plugin.version>3.9.1</maven.site.plugin.version>
     <maven.plugin.plugin.version>3.5</maven.plugin.plugin.version>
-    <maven.version>3.6.0</maven.version>
+    <maven.version>3.6.3</maven.version>
     <java.compilation.level>1.8</java.compilation.level>
     <tomcat.version>9.0.31</tomcat.version>
     <maven.compiler.source>${java.compilation.level}</maven.compiler.source>