Merge pull request #67 from io7m-com/dependabot/maven/develop/ch.qos.logback-logback-classic-1.5.21

Automatically merged by ghtools. Audit ID: 826271a3-3104-4dc8-8bb4-1a2e8746aa2b

Author: io7m

pom.xml

@@ -103,7 +103,7 @@
       <dependency>
         <groupId>ch.qos.logback</groupId>
         <artifactId>logback-classic</artifactId>
-        <version>1.5.20</version>
+        <version>1.5.21</version>
         <exclusions>
           <exclusion>
             <groupId>com.sun.mail</groupId>