Anjay 3.6.1

Improvements

• Optimized heap memory usage: SenML CBOR payloads for Send and Notify
  operations are no longer serialized in memory in their entirety unless their
  contents depend on the Access Control object state
• Added a public define for MSISDN string size
• Optimized "Out of memory" logs in favor of a smaller flash memory footprint

Bugfixes

• (commercial feature only) Fixes for various bugs that could cause invalid
  memory accesses when restoring data from corrupted core persistence data