TemporaryFolder on unix-like systems does not limit access to created files

Upgraded junit:junit to version 4.13.1

Author: peterkral-pdfix

pom.xml

@@ -29,15 +29,15 @@
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
-      <version>4.11</version>
+      <version>4.13.1</version>
       <scope>test</scope>
     </dependency>
     <dependency>
         <groupId>org.junit.jupiter</groupId>
         <artifactId>junit-jupiter</artifactId>
         <version>5.10.0</version>
         <scope>test</scope>
-    </dependency>    
+    </dependency>
     <dependency>
       <groupId>net.pdfix</groupId>
       <artifactId>net.pdfix.pdfixlib</artifactId>