bump bouncycastle dependency
<dependencies.scope>compile</dependencies.scope>
<!-- versions for various dependencies -->
<aspectj.version>1.5.4</aspectj.version>
- <bouncycastle.version>1.52</bouncycastle.version>
+ <bouncycastle.version>1.64</bouncycastle.version>
<commons-collections.version>3.2.1</commons-collections.version>
<commons-io.version>2.4</commons-io.version>
<de.uni_koblenz.aggrimm.icp.version>1.0.1</de.uni_koblenz.aggrimm.icp.version>
