Bump bouncycastle version (#655)

Author: bonkf

build-publishing.gradle

@@ -17,7 +17,7 @@ configurations {
   pom
 }
 
-def bouncycastleVersion = "1.66"
+def bouncycastleVersion = "1.67"
 
 dependencies {
   compile "org.slf4j:slf4j-api:1.7.7"

build.gradle

@@ -40,7 +40,7 @@ repositories {
 
 configurations.compile.transitive = false
 
-def bouncycastleVersion = "1.66"
+def bouncycastleVersion = "1.67"
 def sshdVersion = "2.1.0"
 
 dependencies {