* Upgrade wagon-ssh to 3.4.3
* Update spring-boot-maven-plugin to 2.4.4
* Update spotbugs-maven-plugin to 4.2.2
* Update japicmp-maven-plugin to 0.15.3
* Check for packfile validity and fd before reading
* Move throw of PackInvalidException outside the catch
* Use FileSnapshot to get lastModified on PackFile
* Include size when comparing FileSnapshot
* Do not reuse packfiles when changed on filesystem
* Expose disposeBody() on RevCommit and RevTag
* ObjectReader: remove the walkAdvice API
* RevWalk: Discard uninteresting commits unless RevSort.BOUNDARY
* ObjectWalk: make setRetainBody(false) the default
* Always attempt delta compression when reuseDeltas is false
* Avoid TemporaryBuffer.Heap on very small deltas
* Correct distribution of allowed delta size along chain length
* Split remaining delta work on path boundaries
* Replace DeltaWindow array with circularly linked list
* Micro-optimize copy instructions in DeltaEncoder
* Micro-optimize DeltaWindow primary loop
* Micro-optimize DeltaWindow maxMemory test to be != 0
* Mark DeltaWindowEntry methods final