Upgrade to Spock 1.0 RELEASE, Groovy 2.4.1

Author: msgilligan

digital-currency/bitcoin/pom.xml

@@ -54,7 +54,7 @@
               <dependency>
                   <groupId>org.codehaus.groovy</groupId>
                   <artifactId>groovy</artifactId>
-                  <version>2.4.0</version>
+                  <version>2.4.1</version>
               </dependency>
           </dependencies>
       </plugin>
@@ -83,7 +83,7 @@
     <dependency>
         <groupId>org.spockframework</groupId>
         <artifactId>spock-core</artifactId>
-        <version>1.0-groovy-2.3-SNAPSHOT</version>
+        <version>1.0-groovy-2.4</version>
         <scope>test</scope>
     </dependency>