Update to PDFBox 2.0.21

Author: jazzido

pom.xml

@@ -250,7 +250,7 @@
     <dependency>
         <groupId>org.apache.pdfbox</groupId>
         <artifactId>pdfbox</artifactId>
-        <version>2.0.21-SNAPSHOT</version>
+        <version>2.0.21</version>
     </dependency>
 
     <dependency>