Add Track-Protocluster Association (#130)

### Briefly, what does this PR introduce?

This PR introduces the `edm4eic::TrackProtoClusterMatch`, which
parallels `edm4eic::TrackProtoClusterLink` but is an association and
thus works with JANA2 2.4.2. This type is intended to provide a stopgap
as described in
[EDM4eic#129](#129).

### What kind of change does this PR introduce?
- [x] Bug fix (issue #129)
- [ ] New feature (issue #__)
- [ ] Documentation update
- [ ] Other: __

### Please check if this PR fulfills the following:
- [ ] Tests for the changes have been added
- [ ] Documentation has been added / updated
- [x] Changes have been communicated to collaborators

### Does this PR introduce breaking changes? What changes might users
need to make to their code?

No.

### Does this PR change default behavior?

No.

---------

Co-authored-by: Dmitry Kalinkin <[email protected]>

Author: ruse-traveler

CMakeLists.txt

@@ -7,7 +7,7 @@ project(EDM4EIC
   LANGUAGES CXX)
 
 SET( ${PROJECT_NAME}_VERSION_MAJOR 8 )
-SET( ${PROJECT_NAME}_VERSION_MINOR 3 )
+SET( ${PROJECT_NAME}_VERSION_MINOR 4 )
 SET( ${PROJECT_NAME}_VERSION_PATCH 0 )
 SET( ${PROJECT_NAME}_VERSION  "${${PROJECT_NAME}_VERSION_MAJOR}.${${PROJECT_NAME}_VERSION_MINOR}.${${PROJECT_NAME}_VERSION_PATCH}" )
 

edm4eic.yaml

@@ -9,7 +9,7 @@
 ## If there are schema version changes that can be evolved, see the podio documentation
 ## for an example: https://github.com/AIDASoft/podio/tree/master/tests/schema_evolution
 ##
-schema_version: 830
+schema_version: 840
 
 options :
   # should getters / setters be prefixed with get / set?
@@ -614,6 +614,15 @@ datatypes:
       - edm4eic::Cluster  cluster           // reference to the cluster
       - edm4eic::Track track                // reference to the track
 
+  edm4eic::TrackProtoClusterMatch:
+    Description: "Match between a ProtoCluster and a Track"
+    Author: "D. Anderson, D. Kalinkin"
+    Members:
+      - float                 weight // weight of this association
+    OneToOneRelations:
+      - edm4eic::Track        from   // reference to the track
+      - edm4eic::ProtoCluster to     // reference to the protocluster
+
 links:
   edm4eic::TrackProtoClusterLink:
     Description: "Link between a ProtoCluster and a Track"