Upgraded Bouncycastle version to 1.66
<!-- NOTE: BC 1.65+ seems to have an NPE bug in Key#getAlgorithm()
* see https://github.com/bcgit/bc-java/issues/684
-->
- <bouncycastle.version>1.64</bouncycastle.version>
+ <bouncycastle.version>1.66</bouncycastle.version>
<slf4j.version>1.7.30</slf4j.version>
<spring.version>5.2.8.RELEASE</spring.version>
<jgit.version>5.8.1.202007141445-r</jgit.version>
