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 <[email protected]>

Author: JLLeitschuh

pom.xml

@@ -67,7 +67,7 @@
     <repository>
       <id>jgit-repository</id>
       <name>Eclipse JGit Repository</name>
-      <url>http://download.eclipse.org/jgit/maven</url>
+      <url>https://download.eclipse.org/jgit/maven</url>
     </repository>
   </repositories>