Merge pull request #21 from reusr1/dependencies-2021-05-10

update outdated org.apache.sling and org.apache.felix dependencies

Thank you for this! The sling-org-apache-sling-launchpad-testing build passes for me with these changes.
diff --git a/src/main/features/base.json b/src/main/features/base.json
index 885a865..4d410f0 100644
--- a/src/main/features/base.json
+++ b/src/main/features/base.json
@@ -102,7 +102,7 @@
             "start-order":"20"
         },
         {
-            "id":"org.apache.sling:org.apache.sling.serviceusermapper:1.5.2",
+            "id":"org.apache.sling:org.apache.sling.serviceusermapper:1.5.4",
             "start-order":"15"
         },
         {
@@ -150,7 +150,7 @@
             "start-order":"5"
         },
         {
-            "id":"org.apache.felix:org.apache.felix.http.jetty:4.1.6",
+            "id":"org.apache.felix:org.apache.felix.http.jetty:4.1.8",
             "start-order":"5"
         },
         {
@@ -170,7 +170,7 @@
             "start-order":"5"
         },
         {
-            "id":"org.apache.sling:org.apache.sling.api:2.23.0",
+            "id":"org.apache.sling:org.apache.sling.api:2.23.4",
             "start-order":"5"
         },
         {
diff --git a/src/main/features/boot.json b/src/main/features/boot.json
index 32a43bb..08f2d6d 100644
--- a/src/main/features/boot.json
+++ b/src/main/features/boot.json
@@ -13,7 +13,7 @@
             "start-order":"1"
         },
         {
-            "id":"org.apache.felix:org.apache.felix.configadmin:1.9.20",
+            "id":"org.apache.felix:org.apache.felix.configadmin:1.9.22",
             "start-order":"1"
         },
         {