[DO NOT MERGE] Move xpp3 to libratory

to avoid that org.xmlpull is contained in both the libratory and the core
bundle at the same time which seemed to cause the following error:

ERROR 08:52:29,916 [saros-connect-xmpp] (ThreadUtils.java:39) Internal Fatal Error:
java.lang.LinkageError: loader constraint violation: loader (instance of org/eclipse/osgi/internal/loader/EquinoxClassLoader) previously initiated loading for a different type with name "org/xmlpull/v1/XmlPullParser"

core/META-INF/MANIFEST.MF

@@ -95,15 +95,12 @@ Export-Package: com.thoughtworks.xstream,
  org.apache.commons.lang3,
  org.apache.commons.lang3.exception,
  org.apache.commons.lang3.time,
- org.apache.commons.lang3.tuple,
- org.xmlpull.mxp1,
- org.xmlpull.v1
+ org.apache.commons.lang3.tuple
 Bundle-ClassPath: .,
  lib/commons-codec-1.3.jar,
  lib/commons-io-2.0.1.jar,
  lib/commons-lang3-3.8.1.jar,
  lib/xstream-1.4.10.jar,
- lib/xpp3-1.1.4c.jar,
  lib/libidn-1.15.jar,
  log4j2.component.properties
 Bundle-Vendor: Saros Project

core/build.gradle.kts

@@ -41,7 +41,6 @@ dependencies {
     releaseDep("org.apache.commons:commons-lang3:3.8.1")
 
     releaseDep("javax.jmdns:jmdns:3.4.1")
-    releaseDep("xpp3:xpp3:1.1.4c")
     releaseDep("com.thoughtworks.xstream:xstream:1.4.10")
     releaseDep("org.gnu.inet:libidn:1.15")
 }

libratory/META-INF/MANIFEST.MF

@@ -27,6 +27,8 @@ Export-Package: org.apache.log4j,
  org.jivesoftware.smackx.bytestreams,
  org.jivesoftware.smackx.bytestreams.ibb,
  org.jivesoftware.smackx.bytestreams.socks5,
+ org.jivesoftware.smackx.entitycaps,
+ org.jivesoftware.smackx.entitycaps.packet,
  org.jivesoftware.smackx.filetransfer,
  org.jivesoftware.smackx.muc,
  org.jivesoftware.smackx.packet,
@@ -46,13 +48,16 @@ Export-Package: org.apache.log4j,
  saros.repackaged.picocontainer.paranamer,
  saros.repackaged.picocontainer.references,
  saros.repackaged.picocontainer.security,
- saros.repackaged.picocontainer.visitors
+ saros.repackaged.picocontainer.visitors,
+ org.xmlpull.mxp1,
+ org.xmlpull.v1
 Bundle-ClassPath: .,
  lib/smack-3.4.1.jar,
  lib/log4j-core-2.13.3.jar,
  lib/log4j-api-2.13.3.jar,
  lib/log4j-1.2-api-2.13.3.jar,
  lib/smackx-3.4.1.jar,
+ lib/xpp3-1.1.4c.jar,
  lib/picocontainer-2.11.2-patched_relocated.jar,
  lib/weupnp.jar
 Bundle-Vendor: Saros Project

libratory/build.gradle.kts

@@ -42,6 +42,7 @@ dependencies {
     // Workaround until we updated to a newer smack version
     releaseDep(files("libs/smack-3.4.1.jar"))
     releaseDep(files("libs/smackx-3.4.1.jar"))
+    releaseDep("xpp3:xpp3:1.1.4c")
     // Workaround until we can publish and use (without a user token) the repackaged jar in GitHub Packages
     releaseDep(rootProject.files("libs/picocontainer-2.11.2-patched_relocated.jar"))
 }