Use HTTPS instead of HTTP to resolve dependencies

This fixes a security vulnerability in this project where the `pom.xml`
files were configuring Maven to resolve dependencies over HTTP instead of
HTTPS.

Signed-off-by: Jonathan Leitschuh <Jonathan.Leitschuh@gmail.com>
diff --git a/pom.xml b/pom.xml
index d205a94..b37bf64 100644
--- a/pom.xml
+++ b/pom.xml
@@ -365,7 +365,7 @@
       <pluginRepositories>
         <pluginRepository>
           <id>apache.snapshots</id>
-          <url>http://repository.apache.org/snapshots</url>
+          <url>https://repository.apache.org/snapshots</url>
           <releases>
             <enabled>false</enabled>
           </releases>
diff --git a/src/it/projects/dependency-sets/massembly-99/pom.xml b/src/it/projects/dependency-sets/massembly-99/pom.xml
index 9fa1b4b..7715209 100644
--- a/src/it/projects/dependency-sets/massembly-99/pom.xml
+++ b/src/it/projects/dependency-sets/massembly-99/pom.xml
@@ -49,7 +49,7 @@
   <pluginRepositories>
     <pluginRepository>
       <id>apache.snapshots</id>
-      <url>http://repository.apache.org/snapshots</url>
+      <url>https://repository.apache.org/snapshots</url>
     </pluginRepository>
   </pluginRepositories>
 </project>
diff --git a/src/it/projects/dependency-sets/using-moduleSet-implied-depSet/pom.xml b/src/it/projects/dependency-sets/using-moduleSet-implied-depSet/pom.xml
index cec5010..d423de4 100644
--- a/src/it/projects/dependency-sets/using-moduleSet-implied-depSet/pom.xml
+++ b/src/it/projects/dependency-sets/using-moduleSet-implied-depSet/pom.xml
@@ -45,7 +45,7 @@
   <pluginRepositories>
     <pluginRepository>
       <id>apache.snapshots</id>
-      <url>http://repository.apache.org/snapshots</url>
+      <url>https://repository.apache.org/snapshots</url>
     </pluginRepository>
   </pluginRepositories>
 </project>