Update changes.txt in preparation for release

Author: brettch

osmosis/src/dist/changes.txt

@@ -1,3 +1,9 @@
+0.49.2
+Revert removal of JPF (Java Plugin Framework). It's still being actively used without a convenient alternative.
+
+0.49.1
+Fix Maven publish process to include all artefacts
+
 0.49.0
 Use GitHub actions instead of Travis CI for continuous integration.
 Improve Gradle performance by enabling parallel execution, build cache and on-demand configuration.