Update dependencies

pom.xml

@@ -46,7 +46,7 @@
           <dependency>
             <groupId>org.codehaus.groovy</groupId>
             <artifactId>groovy-all</artifactId>
-            <version>2.3.6</version>
+            <version>2.3.8</version>
           </dependency>
         </dependencies>
       </plugin>
@@ -104,7 +104,7 @@
     <dependency>
       <groupId>com.h2database</groupId>
       <artifactId>h2</artifactId>
-      <version>1.4.181</version>
+      <version>1.4.182</version>
     </dependency>
   </dependencies>
 
@@ -112,7 +112,7 @@
   <!-- Only required if a snapshot version of Spock is used -->
     <repository>
       <id>spock-snapshots</id>
-      <url>http://oss.sonatype.org/content/repositories/snapshots/</url>
+      <url>https://oss.sonatype.org/content/repositories/snapshots/</url>
       <snapshots>
         <enabled>true</enabled>
       </snapshots>
@@ -123,14 +123,14 @@
   <pluginRepositories>
     <pluginRepository>
       <id>spock-snapshots</id>
-      <url>http://oss.sonatype.org/content/repositories/snapshots/</url>
+      <url>https://oss.sonatype.org/content/repositories/snapshots/</url>
       <snapshots>
         <enabled>true</enabled>
       </snapshots>
     </pluginRepository>
   </pluginRepositories>
 
-  <!-- Only required by spock-example build -->
+  <!-- Only required in spock-example build -->
   <distributionManagement>
     <repository>
       <id>foo</id>