Bump core.version from 4.5.4 to 4.5.7 (#335)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pom.xml

@@ -15,7 +15,7 @@
 
   <properties>
     <java.version>1.8</java.version>
-    <core.version>4.5.4</core.version>
+    <core.version>4.5.7</core.version>
     <minelib.version>1.2.3</minelib.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>