Update maven repo to https

From Jan 15, 2020 Maven Central Repository no longer supports HTTP and requires that all requests to the repository are encrypted over HTTPS.
https://support.sonatype.com/hc/en-us/articles/360041287334

Also start 2.2.2-dev

Change-Id: Ic90eefb7eae0bdc8280cb244d1a1d3bc9f03224f
diff --git a/VERSION b/VERSION
index c043eea..97102b4 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.2.1
+2.2.2-dev
diff --git a/dependencies.xml b/dependencies.xml
index e085b0a..7d6ec3d 100644
--- a/dependencies.xml
+++ b/dependencies.xml
@@ -84,7 +84,7 @@
         <repository>
             <id>central</id>
             <name>Central Repository</name>
-            <url>http://repo.maven.apache.org/maven2</url>
+            <url>https://repo.maven.apache.org/maven2</url>
             <layout>default</layout>
             <snapshots>
                 <enabled>false</enabled>