0.9.0

Breaking changes

• The input file is now a positional argument:

  hprof-slurp heap.hprof        # replaces: hprof-slurp -i heap.hprof

• The JSON output is restructured: new schema_version, tool and dump metadata
  (file, format, id size, capture time) and heap totals; the top-N lists move under heap.

Features

• New diff subcommand to find leaking classes between two dumps of the same process
  (based on a contribution from @johnneerdael in #304):

  hprof-slurp diff before.hprof after.hprof

• New --output <path> flag to control the location of the JSON result file.
• The dump capture time is displayed in the summary and in the JSON output.

Fixes

• No longer panics on dumps referencing class definitions that were never loaded
  (seen in modern Android dumps); affected objects are reported as <unknown class>
  with an end-of-run warning.
• No longer panics on stack traces referencing missing frames or class metadata.
• Output ordering is fully deterministic when the same class is loaded by multiple classloaders.
• --top is validated by the CLI parser and rejects 0.